SQLSTAT[2300]: Integrity contraint violation when executing a rule that saves new content

With latest D7 dev core, latest Rules and other modules:
After execution of a rule 'after saving new content' with action 'save content', I get the following error:

PDOException: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '4993-345-tac_lite' for key 'PRIMARY': INSERT INTO {node_access} (nid, realm, gid, grant_view, grant_update, grant_delete) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5); Array ( [:db_insert_placeholder_0] => 4993 [:db_insert_placeholder_1] => tac_lite [:db_insert_placeholder_2] => 345 [:db_insert_placeholder_3] => 1 [:db_insert_placeholder_4] => 0 [:db_insert_placeholder_5] => 0 ) in node_access_write_grants() (line 3545 of /home/myoffice/public_html/modules/node/node.module).

I'm not sure if this I need to post this here, or in the Tac Lite issues or in the Durpal core issues.
Thanks for having a look..