diff --git a/git-teaspeak b/git-teaspeak
index 965281a..819ba6d 160000
--- a/git-teaspeak
+++ b/git-teaspeak
@@ -1 +1 @@
-Subproject commit 965281a51a1f8fbaebbfc9cfeaa51dd25ce49385
+Subproject commit 819ba6d0903e1d102fff5921669d223ed72982c4
diff --git a/server/CMakeLists.txt b/server/CMakeLists.txt
index c35841c..0ae7687 100644
--- a/server/CMakeLists.txt
+++ b/server/CMakeLists.txt
@@ -267,7 +267,6 @@ target_link_libraries(TeaSpeakServer
 		sqlite3
 
 		${LIBRARY_PATH_BREAKPAD}
-		${LIBRARY_PATH_JDBC}
 		${LIBRARY_PATH_PROTOBUF}
 
 		#${LIBWEBRTC_LIBRARIES} #ATTENTIAN! WebRTC does not work with crypto! (Already contains a crypto version)
diff --git a/server/src/Group.cpp b/server/src/Group.cpp
index 5134922..b19efd0 100644
--- a/server/src/Group.cpp
+++ b/server/src/Group.cpp
@@ -309,7 +309,7 @@ std::shared_ptr<Group> GroupManager::createGroup(GroupTarget target, GroupType t
     return group;
 }
 
-bool GroupManager::copyGroup(std::shared_ptr<Group> group, GroupType type, std::string name, ServerId targetServerId) {
+GroupId GroupManager::copyGroup(std::shared_ptr<Group> group, GroupType type, std::string name, ServerId targetServerId) {
 	auto group_server = group->handle->getServerId();
     auto groupId = generateGroupId(this->sql);
 
@@ -331,14 +331,14 @@ bool GroupManager::copyGroup(std::shared_ptr<Group> group, GroupType type, std::
         this->loadGroupFormDatabase(groupId);
 	else if(this->root)
 		this->root->loadGroupFormDatabase(groupId);
-    return true;
+    return groupId;
 }
 
 bool GroupManager::copyGroupPermissions(const shared_ptr<Group> &source, const shared_ptr<Group> &target) {
 	auto targetServer = target->handle->getServerId();
 	auto sourceServer = source->handle->getServerId();
 
-	auto res = sql::command(this->sql, "DELETE FROM `permissions` WHERE `serverId` = :sid AND `type` = :type AND `id` = :id", variable{":sid", this->getServerId()}, variable{":type", SQL_PERM_GROUP}, variable{":id", target->groupId()}).execute();
+	auto res = sql::command(this->sql, "DELETE FROM `permissions` WHERE `serverId` = :sid AND `type` = :type AND `id` = :id", variable{":sid", targetServer}, variable{":type", SQL_PERM_GROUP}, variable{":id", target->groupId()}).execute();
 	LOG_SQL_CMD(res);
 
     res = sql::command(this->sql, "INSERT INTO `permissions` (`serverId`, `type`, `id`, `channelId`, `permId`, `value`, `grant`) SELECT :tsid AS `serverId`, `type`, :target AS `id`, 0 AS `channelId`, `permId`, `value`,`grant` FROM `permissions` WHERE `serverId` = :ssid AND `type` = :type AND `id` = :source",
diff --git a/server/src/Group.h b/server/src/Group.h
index 99b5a4c..0c8d418 100644
--- a/server/src/Group.h
+++ b/server/src/Group.h
@@ -190,7 +190,7 @@ namespace ts {
             void setChannelGroup(ClientDbId cldbId, std::shared_ptr<Group>, std::shared_ptr<BasicChannel> , std::chrono::time_point<std::chrono::system_clock> until = std::chrono::time_point<std::chrono::system_clock>());
 
             std::shared_ptr<Group> createGroup(GroupTarget target, GroupType type, std::string name);
-            bool copyGroup(std::shared_ptr<Group> group, GroupType type, std::string name, ServerId targetServerId);
+            GroupId copyGroup(std::shared_ptr<Group> group, GroupType type, std::string name, ServerId targetServerId);
             bool copyGroupPermissions(const std::shared_ptr<Group>& source, const std::shared_ptr<Group>& target);
 
             bool reloadGroupPermissions(std::shared_ptr<Group>);
diff --git a/server/src/client/ConnectedClientCommandHandler.cpp b/server/src/client/ConnectedClientCommandHandler.cpp
index a43c9e2..f9b90df 100644
--- a/server/src/client/ConnectedClientCommandHandler.cpp
+++ b/server/src/client/ConnectedClientCommandHandler.cpp
@@ -981,46 +981,98 @@ CommandResult ConnectedClient::handleCommandChannelGroupAdd(Command &cmd) {
 
 //name=Channel\sAdmin scgid=5 tcgid=4 type=1
 CommandResult ConnectedClient::handleCommandChannelGroupCopy(Command &cmd) {
-    CMD_RESET_IDLE;
-    CMD_CHK_AND_INC_FLOOD_POINTS(5);
+	CMD_RESET_IDLE;
+	CMD_CHK_AND_INC_FLOOD_POINTS(5);
+
+	auto ref_server = this->server;
 	CACHED_PERM_CHECK(permission::b_virtualserver_channelgroup_create, 1, true);
 
-	auto group_manager = this->server ? this->server->getGroupManager() : serverInstance->getGroupManager().get();
-    auto src = group_manager->findGroup(cmd["scgid"].as<GroupId>());
-    if (!src || src->target() != GROUPTARGET_CHANNEL) return {findError("parameter_invalid"), "invalid channel group id"};
+	auto group_manager = this->server ? this->server->groups : serverInstance->getGroupManager().get();
 
-    bool global = false;
-    if(cmd[0].has("tcgid")&& cmd["tcgid"].as<GroupId>() != 0) {
-        auto target = group_manager->findGroup(cmd["tcgid"].as<GroupId>());
-	    if (!target || target->target() != GROUPTARGET_CHANNEL) return {findError("parameter_invalid"), "invalid target channel group id"};
-	    auto result = group_manager->copyGroupPermissions(src, target);
-	    if(!result) return {findError("vs_critical"), "could not copy group!"};
-	    global = !this->server || group_manager->isLocalGroup(target);
-    } else {
-		auto type = cmd["type"].as<GroupType>();
-	    if(type == GroupType::GROUP_TYPE_QUERY)
-		    CACHED_PERM_CHECK(permission::b_serverinstance_modify_querygroup, 1, true);
-	    if(type == GroupType::GROUP_TYPE_TEMPLATE)
-		    CACHED_PERM_CHECK(permission::b_serverinstance_modify_templates, 1, true);
+	auto source_group_id = cmd["scgid"].as<GroupId>();
+	auto source_group = group_manager->findGroup(source_group_id);
 
-	    if(type == GroupType::GROUP_TYPE_NORMAL && !this->server) return {findError("parameter_invalid"), "You cant create normal channel groups on the template server"};
-	    auto result = group_manager->copyGroup(src, cmd["type"], cmd["name"], type == GROUP_TYPE_NORMAL ? this->getServerId() : 0); //TODO maybe check by name? No duplicated groups?
-	    if (!result) return {findError("vs_critical"), "could not copy group!"};
-	    global = !this->server || type != GroupType::GROUP_TYPE_NORMAL;
+	if(!source_group || source_group->target() != GROUPTARGET_CHANNEL)
+		return {findError("group_invalid_id"), "invalid source group"};
 
-	    if(this->getType() == ClientType::CLIENT_QUERY) {
-	        Command notify("");
-	        notify["cgid"] = group_manager->availableChannelGroups(false).back()->groupId();
-	        this->sendCommand(notify);
-	    }
-    }
+	const auto group_type_modificable = [&](GroupType type) {
+		switch(type) {
+			case GroupType::GROUP_TYPE_TEMPLATE:
+				if(!this->permission_granted(this->permissionValue(permission::b_serverinstance_modify_templates, 0), 1, true))
+					return permission::b_serverinstance_modify_templates;
+				break;
+			case GroupType::GROUP_TYPE_QUERY:
+				if(!this->permission_granted(this->permissionValue(permission::b_serverinstance_modify_querygroup, 0), 1, true))
+					return permission::b_serverinstance_modify_querygroup;
+				break;
 
-    for(const auto& server : (global ? serverInstance->getVoiceServerManager()->serverInstances() : deque<shared_ptr<TSServer>>{this->server}))
-    	if(server)
-		    server->forEachClient([](shared_ptr<ConnectedClient> cl) {
-		        cl->notifyChannelGroupList();
-		    });
-    return CommandResult::Success;
+			default:
+				break;
+		}
+		return permission::undefined;
+	};
+
+	{
+		auto result = group_type_modificable(source_group->type());
+		if(result != permission::undefined)
+			return CommandResultPermissionError{result};
+	}
+
+	auto global_update = false;
+	if(cmd[0].has("tcgid") && cmd["tcgid"].as<GroupId>() != 0) {
+		//Copy an existing group
+		auto target_group = group_manager->findGroup(cmd["tcgid"]);
+		if(!target_group || target_group->target() != GROUPTARGET_CHANNEL)
+			return {findError("group_invalid_id"), "invalid target group"};
+
+		{
+			auto result = group_type_modificable(target_group->type());
+			if(result != permission::undefined)
+				return CommandResultPermissionError{result};
+		}
+
+		if(!target_group->permission_granted(permission::i_channel_group_needed_modify_power, this->calculate_permission_value(permission::i_channel_group_modify_power, 0), true))
+			return CommandResultPermissionError{permission::i_channel_group_modify_power};
+
+		if(!group_manager->copyGroupPermissions(source_group, target_group))
+			return {findError("vs_critical"), "failed to copy group permissions"};
+
+		global_update = !this->server || !group_manager->isLocalGroup(target_group);
+	} else {
+		//Copy a new group
+		auto target_type = cmd["type"].as<GroupType>();
+
+		{
+			auto result = group_type_modificable(target_type);
+			if(result != permission::undefined)
+				return CommandResultPermissionError{result};
+		}
+
+		if(!ref_server && target_type == GroupType::GROUP_TYPE_NORMAL)
+			return {findError("parameter_invalid"), "You cant create normal groups on the template server!"};
+
+		if(!group_manager->findGroup(GroupTarget::GROUPTARGET_CHANNEL, cmd["name"].string()).empty())
+			return {findError("group_name_used"), "You cant create normal groups on the template server!"};
+
+		auto target_group_id = group_manager->copyGroup(source_group, target_type, cmd["name"], target_type != GroupType::GROUP_TYPE_NORMAL ? 0 : this->getServerId());
+		if(target_group_id == 0)
+			return {findError("vs_critical"), "failed to copy group"};
+
+		if(this->getType() == ClientType::CLIENT_QUERY) {
+			Command notify("");
+			notify["cgid"] = target_group_id;
+			this->sendCommand(notify);
+		}
+
+		global_update = !this->server || !group_manager->isLocalGroup(group_manager->findGroup(target_group_id));
+	}
+
+	for(const auto& server : (global_update ? serverInstance->getVoiceServerManager()->serverInstances() : deque<shared_ptr<TSServer>>{this->server}))
+		if(server)
+			server->forEachClient([](shared_ptr<ConnectedClient> cl) {
+				cl->notifyChannelGroupList();
+			});
+	return CommandResult::Success;
 }
 
 CommandResult ConnectedClient::handleCommandChannelGroupRename(Command &cmd) {
@@ -2578,48 +2630,94 @@ CommandResult ConnectedClient::handleCommandServerGroupAdd(Command &cmd) {
     return CommandResult::Success;
 }
 
-//name=Server\sAdmin\s(Copy) ssgid=1 tsgid=0 type=1
 CommandResult ConnectedClient::handleCommandServerGroupCopy(Command &cmd) {
     CMD_RESET_IDLE;
     CMD_CHK_AND_INC_FLOOD_POINTS(5);
 
+    auto ref_server = this->server;
 	CACHED_PERM_CHECK(permission::b_virtualserver_servergroup_create, 1, true);
 
     auto group_manager = this->server ? this->server->groups : serverInstance->getGroupManager().get();
 
-    bool global = false;
-    auto src = group_manager->findGroup(cmd["ssgid"].as<GroupId>());
-    if (!src || src->target() != GROUPTARGET_SERVER) return {findError("parameter_invalid"), "invalid server group id"};
-	if(cmd[0].has("tsgid") && cmd["tsgid"].as<GroupId>() != 0) {
-		auto target = group_manager->findGroup(cmd["tsgid"].as<GroupId>());
-		if (!target || target->target() != GROUPTARGET_SERVER) return {findError("parameter_invalid"), "invalid target server group id"};
-		auto result = group_manager->copyGroupPermissions(src, target);
-		if(!result) return {findError("vs_critical"), "could not copy group!"};
-		global = !this->server || group_manager->isLocalGroup(target);
-	} else {
-	    //GroupType
-        auto type = cmd["type"].as<GroupType>();
-        if(type == GroupType::GROUP_TYPE_NORMAL && !this->server) return {findError("parameter_invalid"), "You cant create normal groups on the template server!"};
-		if(type == GroupType::GROUP_TYPE_QUERY) {
-			if(!this->permission_granted(this->cached_permission_value(permission::b_serverinstance_modify_querygroup), 1, true))
-				return CommandResultPermissionError{permission::b_serverinstance_modify_querygroup};
-		} else if(type == GroupType::GROUP_TYPE_TEMPLATE) {
-			if(!this->permission_granted(this->cached_permission_value(permission::b_serverinstance_modify_templates), 1, true))
-				return CommandResultPermissionError{permission::b_serverinstance_modify_templates};
-		}
+    auto source_group_id = cmd["ssgid"].as<GroupId>();
+    auto source_group = group_manager->findGroup(source_group_id);
 
-		auto result = group_manager->copyGroup(src, type, cmd["name"], type != GroupType::GROUP_TYPE_NORMAL ? 0 : this->getServerId()); //TODO maybe check by name? No duplicated groups?
-		if (!result) return {findError("vs_critical"), "could not copy group!"};
-		global = !this->server || type != GroupType::GROUP_TYPE_NORMAL;
+    if(!source_group || source_group->target() != GROUPTARGET_SERVER)
+	    return {findError("group_invalid_id"), "invalid source group"};
 
-        if(this->getType() == ClientType::CLIENT_QUERY) {
-            Command notify("");
-            notify["sgid"] = group_manager->availableServerGroups(false).back()->groupId();
-            this->sendCommand(notify);
-        }
+    const auto group_type_modificable = [&](GroupType type) {
+	    switch(type) {
+		    case GroupType::GROUP_TYPE_TEMPLATE:
+			    if(!this->permission_granted(this->permissionValue(permission::b_serverinstance_modify_templates, 0), 1, true))
+				    return permission::b_serverinstance_modify_templates;
+			    break;
+		    case GroupType::GROUP_TYPE_QUERY:
+			    if(!this->permission_granted(this->permissionValue(permission::b_serverinstance_modify_querygroup, 0), 1, true))
+				    return permission::b_serverinstance_modify_querygroup;
+			    break;
+
+		    default:
+			    break;
+	    }
+	    return permission::undefined;
+    };
+
+	{
+		auto result = group_type_modificable(source_group->type());
+		if(result != permission::undefined)
+			return CommandResultPermissionError{result};
 	}
 
-	for(const auto& server : (global ? serverInstance->getVoiceServerManager()->serverInstances() : deque<shared_ptr<TSServer>>{this->server}))
+	auto global_update = false;
+    if(cmd[0].has("tsgid") && cmd["tsgid"].as<GroupId>() != 0) {
+    	//Copy an existing group
+    	auto target_group = group_manager->findGroup(cmd["tsgid"]);
+	    if(!target_group || target_group->target() != GROUPTARGET_SERVER)
+		    return {findError("group_invalid_id"), "invalid target group"};
+
+    	{
+		    auto result = group_type_modificable(target_group->type());
+		    if(result != permission::undefined)
+			    return CommandResultPermissionError{result};
+	    }
+
+	    if(!target_group->permission_granted(permission::i_server_group_needed_modify_power, this->calculate_permission_value(permission::i_server_group_modify_power, 0), true))
+	    	return CommandResultPermissionError{permission::i_server_group_modify_power};
+
+	    if(!group_manager->copyGroupPermissions(source_group, target_group))
+		    return {findError("vs_critical"), "failed to copy group permissions"};
+
+	    global_update = !this->server || !group_manager->isLocalGroup(target_group);
+    } else {
+	    //Copy a new group
+	    auto target_type = cmd["type"].as<GroupType>();
+
+	    {
+		    auto result = group_type_modificable(target_type);
+		    if(result != permission::undefined)
+			    return CommandResultPermissionError{result};
+	    }
+
+	    if(!ref_server && target_type == GroupType::GROUP_TYPE_NORMAL)
+		    return {findError("parameter_invalid"), "You cant create normal groups on the template server!"};
+
+	    if(!group_manager->findGroup(GroupTarget::GROUPTARGET_SERVER, cmd["name"].string()).empty())
+		    return {findError("group_name_used"), "You cant create normal groups on the template server!"};
+
+	    auto target_group_id = group_manager->copyGroup(source_group, target_type, cmd["name"], target_type != GroupType::GROUP_TYPE_NORMAL ? 0 : this->getServerId());
+	    if(target_group_id == 0)
+	        return {findError("vs_critical"), "failed to copy group"};
+
+	    if(this->getType() == ClientType::CLIENT_QUERY) {
+		    Command notify("");
+		    notify["sgid"] = target_group_id;
+		    this->sendCommand(notify);
+	    }
+
+	    global_update = !this->server || !group_manager->isLocalGroup(group_manager->findGroup(target_group_id));
+    }
+
+	for(const auto& server : (global_update ? serverInstance->getVoiceServerManager()->serverInstances() : deque<shared_ptr<TSServer>>{this->server}))
 		if(server)
 			server->forEachClient([](shared_ptr<ConnectedClient> cl) {
 				cl->notifyServerGroupList();
diff --git a/shared b/shared
index a3c5bcb..c532266 160000
--- a/shared
+++ b/shared
@@ -1 +1 @@
-Subproject commit a3c5bcb9f2f36598675da74dfb118b76eeff99fa
+Subproject commit c532266cb8b1ba577e063c6ed14a810374c8c84f