Solution : https://service.sap.com/sap/support/notes/784777 (SAP Service marketplace login required)
Key words :
tab page 'user-defined text', system generates error message, user-defined text, specification managementsymptom description, prerequisites causethe problem, i_api_prop_ftext_old_tab type spec, internal program error, erp 2004 support package 05, start transaction se37, function module ehsb302_vai_write
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900676 | Referenced compositions are missing in report |
857228 | Reading referenced overwritten data with EH&S Expert |