Error in structure of group table, cannot be copied

What causes this issue?

When copying the number range intervals from &V1& &V2& to &V3&, an
error was detected in the structure of &V4&. This error points to an
inconsistency between the intervals and the group table. Such
inconsistencies occur if number range numbers are entered in the group
table directly instead of with number range maintenance.

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?

The system administrator should do the following:
Compare the number range numbers in the group table with those in table
NRIV for the object/subobject and, if necessary, delete the numbers
from the group table.

Error message extract from SAP system. Copyright SAP SE.