2900591 - Releasing a transport results with error message: ' ' is not a valid language Message no. TK295

Releasing a transport request (TR) results with error message:

Key messages: TABU /IWFND/C_V!_MSGT 300/IWNGW/NOTIFICATION
" " is not a valid language

Key messages: TABU /IWFND/C_V4_RSAG 300/IWNGW/NOTIFICATION LOCAL
Enter key generically

' ' is not a valid language
Message no. TK295

Diagnosis
A key with language "' '" was specified for table "/IWFND/C_V4_MSGT". This is not a valid language.
This applies to field "LANGUAGE"

System response
The system rejects the key.

Procedure
Enter a valid language. This is usually the language you logged on in.
You logged on in language "<one character long language code>".
Table T002 contains a list of valid languages.

Despite all that in SE11 the /IWFND/C_V4_MSGT table contains the proper value.

SAP Gateway SAP_GWFND under 753 SP03

/IWFND/C_V4_MSGT, notification, channel, odata, gw, iw_fnd, iw_bep, iw_cor, IWNGW , KBA , OPU-GW-NOT , Notification , Problem