Solution : https://service.sap.com/sap/support/notes/339691 (SAP Service marketplace login required)
Key words : 
conne_import_wrong_comp_leng orimport_alignment_mismatchmay occur, customer-specific fields, source code relevant, data structures changed, affected info structures, v3 update terminates, communication structures, update records, update terminationconne_import_wrong_comp_leng, update module
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| 204130 | SIS update: Collective note |