Company codes &/& do not appear in proposal & &; correct

What causes this issue?

No data exists for the specified <ZH>paying company code</> &V1& and
the specified <ZH>sending company code</> &V2& in payment proposal &V3&
&V4&.

System Response

The payment proposal cannot be edited.

How to fix this error?

Check the flow trace and payment proposal list in order to determine
why the specified company codes are not contained in the proposal.

Error message extract from SAP system. Copyright SAP SE.