Solution : https://service.sap.com/sap/support/notes/40161 (SAP Service marketplace login required)
Key words : 
additional key words rguxi301, fi-sl user exits, fi-sl field movements, error gu093 'errors occurred, affected field movements, abperthis field exists, error log is1, field accit_glx-ps_psp_pnr, field movements, occurred errors
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