T44362 reports a large number of item creation attempts is failing.
T268625#6651803 suggested to introduce a limiting the rate on which item IDs for newly created Items are generated, so that bad requests cannot generate (i.e. skip) item IDs at an inappropriately high rate. (Successful Item creation is already rate limited.)
- It possible to control/limit the rate on which new item IDs are generated on Wikidata