2484118 - In phase PREP_IMPORT/TOOLIMPI, getting error HALT: Internal error during writing of dynpro fields to the database

While performing an upgrade via SUM, a similar error occurred, as shown below, during the PREP_IMPORT/TOOLIMPI phase.

Checks after phase PREP_IMPORT/TOOLIMPI were negative!

Last error code set: Detected 2 aborted activities in 'TOOLIMPI.ELG' Calling '/usr/sap/<SID>/DVEBMGS00/exe/tp' failed with return code 16, check /usr/sap/<SID>/SUM/abap/log/SAPup.ECO for details

ERROR:
Detected the following errors:

/SUM/abap/log/SAPI701EHP.<SID>:
4 ETW690 COMMIT "149578" "8668249"
4 ETW000 successfully set a temporary lock on table TRDIRT
4 ETW000 1 entry for TRDIRT updated (CRR_OPERATION_BATCH *).
4 ETW690 COMMIT "222" "8668471"
4 ETW000 REPOTECRR_OPERATION_BATCH A replaced.
1AETW000 ===> HALT: Internal error during writing of dynpro fields to the database. No conversion to 46 available. [/bas/742_REL/src/cts/R3trans/twimport.c,5065] Please contact the SAP support.
Trouble Ticket GenerationA trouble ticket and an archive with all relevant log files have been generated.
Trouble ticket: "/usr/sap/<SID>/SUM/abap/log/SAPup_troubleticket.log"
Log archive: "/usr/sap/<SID>/SUM/abap/log/SAPup_troubleticket_logs.sar"
Repeat phase PREP_IMPORT/TOOLIMPI to continue at the point it stopped

TOOLIMPI.ELG
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~MAIN IMPORT ERRORS and RETURN CODE in SAPI701EHP.<SID>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

4 ETW690 COMMIT "149578" "8668249"4 ETW000 successfully set a temporary lock on table TRDIRT

4 ETW000   1 entry for TRDIRT updated  (CRR_OPERATION_BATCH                     *).

4 ETW690 COMMIT "222" "8668471"4 ETW000 REPOTECRR_OPERATION_BATCH                      

A replaced.1AETW000 ===> HALT: Internal error during writing of dynpro fields to the database. No conversion to 46 available. [/bas/742_REL/src/cts/R3trans/twimport.c,5065]

 Please contact the SAP support.1 ETP111 exit code           : "16"

NetWeaver ABAP system.

kernel update version, TOOLIMPI, TRDIRT updated
, KBA , BC-UPG-TLS-TLA , Upgrade tools for ABAP , Problem