A system error has occurred while locking data

What causes this issue?

The system could not lock this record for technical reasons.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Wait two or three minutes, then repeat what you have just done. If you
receive this message again, inform your system administrator.
<ZV>(Translator: copied from M8101)</>

Error message extract from SAP system. Copyright SAP SE.