Retag Job after it finished

I suppose you could add a .retag step and "restart" the job running only the .retag step (make sure you set "sync commands" to yes).

New steps are not recognized but also if I try to add a retag command to an existing step the sync command does not lead to a change of the command.
Do we have to change something in the configeration to let it work?

New steps are not recognized but also if I try to add a retag command to an existing step the sync command does not lead to a change of the command.
Do we have to change something in the configeration to let it work?

There is a known defect where sync-command doesn't take effect in inlined projects. You could try it in a top-level step.

The only other option to modify tags of completed builds is direct DB manipulation. the builds and their associated tags are stored in the BF_BUILDS table. Be very careful modifying this data as you can cause yourself problems that support can't solve. If you modify the tag (BF_TAG), make sure your where clause identifies the record by the BF_ID column.

and ALWAYS ALWAYS ALWAYS backup your database before doing something like this.