Cost estimate for material & could not be locked

What causes this issue?

You are attempting to cost material &V1& in plant &V2&, but the cost
estimate is blocked by another costing transaction.

System Response

The costing results for this material are incorrect. If you carry out
costing online, you cannot save the costing.

How to fix this error?

Carry out costing again later.

Error message extract from SAP system. Copyright SAP SE.