<p>I got the same error on Bisq v0.9.3. My wallet was backed up around Bisq version v0.5.1. The log file says:</p>
<pre><code>[JavaFX Application Thread] ERROR b.c.b.s.WalletsSetup: Service failure from state: STARTING; failure={} java.io.IOException: org.bitcoinj.store.BlockStoreException: java.nio.channels.OverlappingFileLockException
        at bisq.core.btc.setup.WalletConfig.startUp(WalletConfig.java:492)
        at com.google.common.util.concurrent.AbstractIdleService$DelegateService$1.run(AbstractIdleService.java:62)
        at com.google.common.util.concurrent.Callables$4.run(Callables.java:122)
        at java.base/java.lang.Thread.run(Thread.java:844)
Caused by: org.bitcoinj.store.BlockStoreException: java.nio.channels.OverlappingFileLockException
        at org.bitcoinj.store.SPVBlockStore.<init>(SPVBlockStore.java:133)
        at bisq.core.btc.setup.WalletConfig.provideBlockStore(WalletConfig.java:329)
        at bisq.core.btc.setup.WalletConfig.startUp(WalletConfig.java:404)
        ... 3 common frames omitted
Caused by: java.nio.channels.OverlappingFileLockException: null
        at java.base/sun.nio.ch.SharedFileLockTable.checkList(FileLockTable.java:255)
        at java.base/sun.nio.ch.SharedFileLockTable.add(FileLockTable.java:152)
        at java.base/sun.nio.ch.FileChannelImpl.tryLock(FileChannelImpl.java:1191)
        at java.base/java.nio.channels.FileChannel.tryLock(FileChannel.java:1160)
        at org.bitcoinj.store.SPVBlockStore.<init>(SPVBlockStore.java:106)
        ... 5 common frames omitted
</code></pre>

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