Database upgrade from oracle 12.2 to 19.13 (latest patch) failed

Hello

During one of our upgrade in oracle to version 19.13, upgrade failed with following error. Kindly guide us for finding root cause.

End of catcon Errors

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Start of Summary Report

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Oracle Database Release 19 Post-Upgrade Status Tool   12-01-2021 10:24:1

Database Name: ADVA

Component                              Current        Full    Elapsed Time

Name                                   Status         Version HH:MM:SS

Oracle Server

  SP2-0310: unable to open file "C:\oracle\product\19.0.0\db_1/rdbms/admin/back

port_files/bug_30387640_apply.sql"

Oracle Server                          INVALID    19.13.0.0.0 00:14:24

Oracle Real Application Clusters    OPTION OFF    19.13.0.0.0 00:00:00

Oracle XML Database                   UPGRADED    19.13.0.0.0 00:01:23

Datapatch                                                       00:01:56

Final Actions                                                   00:02:00

Post Upgrade                                                    00:00:22

Total Upgrade Time: 00:18:31

Database time zone version is 26. It is older than current release time