Prule.daemon: Add http error exception

prule/daemon/__main__.py

@@ -59,6 +59,7 @@ API_TAG_SCOPE                   Boolean, If true, uses scopes and adds default '
 METADATA_MESSAGE                HTML insert added to the metadata
 JOB_PROCESS_QUIET               Boolean, If true, pass --quiet to prule and do not print full result json,
                                          if false print result json (default: true)
+PRINT_TIMING                    Boolean, If true, print debug timing information
 
 Example state file:
 {
@@ -496,6 +497,8 @@ class PruleThread(threading.Thread):
             if e.code == 401:
                 print("HTTP Error 401: Unauthorized, ClusterCockpit API TOKEN invalid?", file=sys.stderr)
                 signal.pthread_kill(config.main_tid, signal.SIGTERM) # shutdown
+            if e.code == 500 and "Duplicate entry" in msg: # TODO: Tag is inserted twice. Fix once tag removal is possible.
+                return True
             return False
         except Exception as e: # something went horribly wrong
             print(e)