Hi,

Enable debug mode and navigate to server action menu under settings and see if there is a server action named:  Correct inconsistencies for reservation

If found, click on Run button, which will solve the issue, if server action is not found, pull the latest source code of corresponding odoo version and upgrade the stock module.

More info:  https://github.com/odoo/odoo/commit/e0e63be484b0ebddc7d498a4a13b2ba7a7f1a1f4#diff-c0d27a4adc8bbd305125f4e2729e30fe444fdd4e5ca0f96f2dd7f1fab19fe80eR17

Thanks