Table DDXTT still contains & entries; never ignore errors

What causes this issue?

The field table of the inactive nametab should be regenerated with
DROP/CREATE. This is only allowed, if there are no more entries in the
header table.

System Response

Error message.

How to fix this error?

The error is due to an error that occurred in the previous phases
(PCON_xxx or PMVNTAB) which you should analyze and eliminate.

Error message extract from SAP system. Copyright SAP SE.