not to unclaim a claimed lrp

Author: kart2bc

db/sqldb/actual_lrp_db.go

@@ -217,6 +217,11 @@ func (db *SQLDB) UnclaimActualLRP(ctx context.Context, logger lager.Logger, key
 			return models.ErrActualLRPCannotBeUnclaimed
 		}
 
+		if actualLRP.State == models.ActualLRPStateClaimed {
+			logger.Debug("already-claimed")
+			return models.ErrActualLRPCannotBeUnclaimed
+		}
+
 		now := db.clock.Now().UnixNano()
 		actualLRP.ModificationTag.Increment()
 		actualLRP.State = models.ActualLRPStateUnclaimed