Field &1 from infotype &2 is of "QUAN" format

What causes this issue?

Quantity fields, that is to say fields in <LS>QUAN</> format, cannot be
used in headers. Since the &V1& field of the &V2& infotype is this type
of field, it cannot be used in the header.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

Determine the missing entry in the IMG for <LS>Personnel Adminsitration
</> in the <LS>Header Structure per Infotype</> view of the "
<DS:SIMG.OHIX0635>Define Infotype Header</>" step, and correct it.

Error message extract from SAP system. Copyright SAP SE.