SQL error: error during INSERT (table: &)

What causes this issue?

When the database tried to make a new entry in table &, an SQL error
occurred.

System Response

Processing was terminated.

How to fix this error?

Ususally, the reason for this error is that an entry already exists
withthe same key.
This problem can occur if the client was copied with the movement data
without adjusting the number range intervals.
Please check if the number ranges for this table have been set
correctly and, if necessary, correct the number range interval.

Error message extract from SAP system. Copyright SAP SE.