The error message indicates that a catalogue is active which is based on an invalid or inactive Kaufland configuration (Kaufland account ID). You can find the Kaufland account IDs under Setup > Settings > Markets > Kaufland > Settings > Overview.

Therefore, check your catalogues and make sure they have the correct Kaufland account assigned. You can check this in the catalogue under Settings > Kaufland Settings > Kaufland Account.

To save the catalogue with the correct account, you must recreate it in the Kaufland catalogue assistant.

Attention! Do not use the catalogue with an invalid Kaufland account ID as a basis for other catalogues (copying). When you use the copy function, you also adopt the account ID.