SAP BP: Unable to activate IBAN only functionality

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Symptom
In the customizing transaction SPRO, when you try to activate IBAN-only functionality through the path Cross-Applications Components -> SAP Business Partner -> Activation Switch for Functions, error R111011 ‘You cannot activate the “IBAN Without Account Number” function’ is thrown.
Other terms
BUP_IBANONLY_CHANGE_CHECK ISM ISM_MEDIA_MD_GEN r111011 IBAN customizing switch framework
Reason and Prerequisites
Earlier, the FM used [...]

BP_SEA Missing entries in TPZ1; phonetic search incorrect

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Symptom
You use the phonetic search (BDT search help). However, you notice that the search help does not work correctly. After you enter the search values, the system generates the message ‘Enter Search Criteria’.
Other terms
Business partner, FS-BP, SAP BP, search, F4 help,
SEARCH, phonetic search help, BDT search, Customizing table TPZ1
Reason and Prerequisites
Entries are missing [...]