3786944 - SUM: Index Activation error during Upgrade phase MAIN_SHDRUN/ACT_UPG: Index" "/ASU/SSMTREED" "001" could not be activated

• You are facing an issue during S4 Hana upgrade from 2023 to 2025 in phase MAIN_SHDRUN/ACT_UPG with similar error message: 
  Activation failed for index below
  3 ED0308 Operation started by user "DDIC" on "25.07.26" at "08:26"
  1EEDT504 No index "/ASU/SSMTREED"-"001" found with status "M"
  3 EDT512 Index "/ASU/SSMTREED"-"001" could not be activated
  .... 
• You can find the following errors in <SUMDIR>/log/ACTUPG.ELG: (some objects might not be listed in all cases)
  1EEDO516X"Index" "/ASU/SSMTREED" "001" could not be activated
  1EEDO516 "Index" "/BDTS/PRES_PORTI" "ATP" could not be activated
  1EEDO516 "Index" "/SDF/BPM_ASTAD" "02" could not be activated
  1EEDO516 "Index" "/SDF/BPM_ASTAD2" "02" could not be activated
  1EEDO516 "Index" "/SDF/BPM_TSTAD" "02" could not be activated
  1EEDO516 "Index" "/SDF/CMO_T_42D" "DEV" could not be activated
  1EEDO516 "Index" "/SDF/CSSIZING" "ID" could not be activated
  1EEDO516 "Index" "/SDF/DRM_RESULTS" "RES" could not be activated
  1EEDO516 "Index" "/SDF/DRM_RES_DE" "RES" could not be activated
  1EEDO516 "Index" "/SDF/EXM_FRJOBID" "JLC" could not be activated
  1EEDO516 "Index" "/SDF/HDB_MON_HIS" "MNT" could not be activated
  1EEDO516 "Index" "/SDF/HDB_MON_HIS" "TST" could not be activated
  1EEDO516 "Index" "/SDF/IVISALETRCV" "TRV" could not be activated
  1EEDO516 "Index" "/SDF/IVISEVTMAIN" "CEV" could not be activated
  1EEDO516 "Index" "/SDF/IVISEVTMAIN" "ETS" could not be activated
  1EEDO516 "Index" "/SDF/RSSIZING" "ID" could not be activated
  1EEDO516 "Index" "/SDF/SCMON_PROG" "OBJ" could not be activated
  1EEDO516 "Index" "/SDF/SMON_STACKH" "HSH" could not be activated
  1EEDO516 "Index" "/SDF/UST12" "VON" could not be activated
  1EEDO516 "Index" "/SOMO/JOBMON14" "1" could not be activated
  1EEDO516 "Index" "/SOMO/JOBMON18" "1" could not be activated
  1EEDO516 "Index" "/SOMO/JOSCHEDLT" "1" could not be activated
  1EEDO516 "Index" "/SOMO/MA_MONOBJ" "JBC" could not be activated
  1EEDO516 "Index" "CNVCDMC_LOGCOMPS" "C01" could not be activated

SAP S/4HANA upgrade from 2023 to 2025 

Source release SAP S/4HANA 2023 contains component version ST-PI 758

index, activation error, R3trans, ACT_UPG phase , DIFFEXPDDIC_IP, ACTUPG.ELG , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , BC-DWB-DIC-AC , ABAP Dictionary Activation and Conversion , BC-DWB-DIC , ABAP Dictionary and ABAP CDS , Problem