When you update Magento 2, Magento extension or switching git branches on your dev environment, sometimes you can get the error:

The following modules are outdated: Vendor_Module schema: current version - x.x.x, required version - z.z.z 

To solve this issue, please do next:

1. Try to get the latest extension code. Run CLI command in the Magento root directory:

composer install

If you get troubles with running this command, then just skip it, and move to step 2.

2. Try to upgrade your database. Run CLI command:

php bin/magento setup:upgrade

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