2859740 - SUM phase EU_CLONE_MIG_DT_RUN aborted due to incomplete cloning for table 'SNAP'

During system upgrade by SUM tool with DMO, below error happens in phase "EU_CLONE_MIG_DT_RUN" on table 'SNAP' which shows different table entries during the migration:

EUMIGRATEDTRUN.LOG

1 ETQ399 ACTION: Checking counters/checksums from 'MIGRATE_DT_CNT.BUC' in directory '/SUM/abap/load/migrate_dt'.
2 ETQ000 ==================================================
3 ETQ399 Summary for COUNT differences:
4EETQ399 Incomplete cloning for table 'SNAP': new 3481 != old 3066!
3 ETQ399 Skipped 172 export-only counts (declustered tables and tables without content transfer).
4EETQ399 Found 1 failed table counts.
4WETQ399 No update statistics necessary for logical time 'EU_CLONE_MIG_DT_RUN'!
4 ETQ010 Date & Time: 20191111110737
1EETQ399 Last error code set is: Found 1 tables with different row count, see
1EETQ399X'/SUM/abap/load/migrate_dt/MIGRATE_DT_CHECKDIFF.LST' for more details on 'repair' option
1EETQ203 Upgrade phase "EU_CLONE_MIG_DT_RUN" aborted with errors ("20191111110737")

/SUM/abap/load/migrate_dt/MIGRATE_DT_CHECKDIFF.LST
#
# By choosing "Accept errors" in the repeat dialogue,
# the following lines in the list below will be handled as follows:
# Line | Repeat cloning | Check again
# | table contents |
# ----------------------------+----------------+---------------
# <TABLENAME> | yes | yes
# #<TABLENAME> | no | yes
# <TABLENAME> ignchecks | no | no
#
# Remarks:
# - Commenting out the line is useful if the wrong count/checksum was
# fixed on the DB manually.
# - In case the cloning is to be repeated, one can change the
# behaviour during cloning by adding phrases like 'nosplit'
# after the table name.
#
# Tables with different row counts/checksums:
SNAP # old: 3066 new: 3481

SAP products based on SAP NetWeaver

EU_CLONE_MIG_DT_RUN, 4EETQ399 Incomplete cloning for table 'SNAP', MIGRATE_DT_CHECKDIFF.LST, Tables with different row counts/checksums, SNAP , KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem