Table & is being processed by others. Processing not possible

What causes this issue?

Table &V1& is being processed by another user.

System Response

The table cannot be maintained by the system while it is blocked by
another user.

How to fix this error?

Please wait for a few minutes, and then re-run the program.
If the table is still blocked, check who is blocking it (to do so,
you need the required authorization).
<DS:TRAN.SM12>Proceed</>

Error message extract from SAP system. Copyright SAP SE.