I found in the config database the following entry:
orientdb {db=config}> select usertoken from upgrade_model_versions;
+----+---------+
| # |usertoken|
+----+---------+
|0 |1.1 |
+----+---------+
1 item(s) found. Query executed ` `in` `0.003 sec(s).
I have now updated the value to “1.5”:
orientdb {db=config}> UPDATE upgrade_model_versions SET usertoken = 1.5
Updated record(s) ` `'1'` `in` `0.019000 sec(s).
Then I was able to run the migrator successfully.
I am currently testing, if the migrated Nexus instance is accepting the new H2 database.