Unfortunately, the only way to solve this issue whole factory reset is necessary on all switches.
The stack should be broken and then rescue the image to all nodes from bootrom individually. This will erase all data from the switches. Then rebuild the stack and load the configuration. Please follow this article to complete rescue process: https://gtacknowledge.extremenetworks.com/articles/How_To/How-To-install-EXOS-Image-via-BootROM-on-G...
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