Lost my Saved Question and Dashboards

I am using open source and created multiple dashboards that are saved in the Metabase database.
Now I am unable to get that dashboard.

Even i am try to migrate it's showing error as mentioned in screenshot

ubuntu@ip-172-31-39-183:~$ chmod +x migrate-metabase-9d63e0dc-3669-452a-9164-82cca9395146.sh
ubuntu@ip-172-31-39-183:~$ ./migrate-metabase-9d63e0dc-3669-452a-9164-82cca9395146.sh
Using Metabase jar: metabase.jar
Determining Metabase version... 0.50.24
Exception in thread "main" org.h2.jdbc.JdbcSQLNonTransientConnectionException: File corrupted while reading record: "/tmp/tmp.zMZbEcaZQ1/migration.mv.db". Possible solution: use the recovery tool [90030-214]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:678)
at org.h2.message.DbException.getJdbcSQLException(DbException.java:477)
at org.h2.message.DbException.get(DbException.java:212)
at org.h2.mvstore.db.Store.convertMVStoreException(Store.java:166)
at org.h2.mvstore.db.Store.(Store.java:145)
at org.h2.engine.Database.(Database.java:324)
at org.h2.engine.Engine.openSession(Engine.java:92)
at org.h2.engine.Engine.openSession(Engine.java:222)
at org.h2.engine.Engine.createSession(Engine.java:201)
at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:338)
at org.h2.jdbc.JdbcConnection.(JdbcConnection.java:122)
at org.h2.util.JdbcUtils.getConnection(JdbcUtils.java:288)
at org.h2.util.JdbcUtils.getConnection(JdbcUtils.java:270)
at org.h2.tools.RunScript.process(RunScript.java:312)
at org.h2.tools.RunScript.runTool(RunScript.java:139)
at org.h2.tools.RunScript.main(RunScript.java:66)
Caused by: org.h2.mvstore.MVStoreException: File is corrupted - unable to recover a valid set of chunks [2.1.214/6]
at org.h2.mvstore.DataUtils.newMVStoreException(DataUtils.java:1004)
at org.h2.mvstore.MVStore.readStoreHeader(MVStore.java:1038)
at org.h2.mvstore.MVStore.(MVStore.java:463)
at org.h2.mvstore.MVStore$Builder.open(MVStore.java:4082)
at org.h2.mvstore.db.Store.(Store.java:136)
... 11 more

Revert to backup.
If no backup, put it down to experience and never use H2 database again.
If you're doing anything more than testing, migrate to either Postgres or MySQL/MariaDB. Preferably Postgres.