Matching-Fields entry is already specified for input record or group; defaults to blanks.
20
Cause . . . . . : A Matching-Fields entry (position 65 - 66 of an Input-Field specification) is already defined for the record type or Field-Record-Relation group.
Recovery . . . : Specify a unique Matching-Fields entry (positions 65 - 66) or omit entry. Compile again.
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