House bank table: No entry with bank key & and account &

What causes this issue?

House bank tables (T012 and T012K) do not contain an entry with bank
key &V1& and account number &V2&.

System Response

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

How to fix this error?

Maintain the house bank tables.
IF &DEVICE& = 'SCREEN'
<DS:TRAN.FI12>Proceed</>
ENDIF
If the currency and/or a branch number is encrypted in the account
number, you have to maintain the account number in the field
"alternative account number".
If the house bank accounts are correctly maintained you have probably
imported an erroneous file. This is often the case when the error
message does not contain a bank key or an account number.

Error message extract from SAP system. Copyright SAP SE.