Date &1 period &2 is not valid

What causes this issue?

<GL:date_type>Date type</> &V2& does not correspond to the date format.

How to fix this error?

Correct the entry. Either enter the format of the date so that it
corresponds to the date type or change the date type to correspond to
the date format.
DEFINE &FELDNAME& = '<LS>Date type</>'
INCLUDE 'NA_POSSIBLE_ENTRY' OBJECT DOKU ID TX LANGUAGE E

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