# Trying to run wallet backup, I always get the error com.google.protobuf.InvalidProtocolBufferException: Protocol message contained invalid tag (zero)

**URL:** <https://bisq.community/t/trying-to-run-wallet-backup-i-always-get-the-error-com-google-protobuf-invalidprotocolbufferexception-protocol-message-contained-invalid-tag-zero/10039>\
**Category:** Uncategorized\
**Created:** [December 8, 2020, 2:32am UTC](https://bisq.community/t/trying-to-run-wallet-backup-i-always-get-the-error-com-google-protobuf-invalidprotocolbufferexception-protocol-message-contained-invalid-tag-zero/10039 "2020-12-08T02:32:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Mudbone](https://bisq.community/letter_avatar/mudbone/32/6_22734026db12803ebb3e059622ac3534.png) [@Mudbone](https://bisq.community/u/Mudbone)\
**Post date:** [December 8, 2020, 2:32am UTC](https://bisq.community/t/trying-to-run-wallet-backup-i-always-get-the-error-com-google-protobuf-invalidprotocolbufferexception-protocol-message-contained-invalid-tag-zero/10039/1 "2020-12-08T02:32:35Z")

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While connecting to btc mainnet  
On multiple devices I get this error when replacing BISQ\_BTC.wallet with my BACKUP file and delete spv chain before restart.

My coins are locked up because of this error.

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**Author:** ![Bayernator](https://bisq.community/user_avatar/bisq.community/bayernator/32/2515_2.png) [@Bayernator](https://bisq.community/u/Bayernator)\
**Post date:** [December 8, 2020, 4:51pm UTC](https://bisq.community/t/trying-to-run-wallet-backup-i-always-get-the-error-com-google-protobuf-invalidprotocolbufferexception-protocol-message-contained-invalid-tag-zero/10039/2 "2020-12-08T16:51:19Z")

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As explained in your last post, replacing the wallet file is NOT a great idea unless no other fix has worked. These wallet files are very susceptible to corruption if not handled correctly.

Here’s how you should proceed with restoring your data.

> **[Restoring application data - Bisq Wiki](https://bisq.wiki/Restoring_application_data)**

Also please update to 1.5.1 hotfix which was release today