Hi everyone,
I need some guidance regarding deployment and upgrade handling in Business Central AL extensions.
I initially developed a customized solution in AL, downloaded symbols, created the extension, and deployed it successfully in the client environment with all required configurations.
Now, there has been a major change in the solution architecture, where the entire code has been migrated to use a new API / different implementation, so I created a new AL package, downloaded symbols again, and completed all code changes.
My concern is this:
If I deploy this new package to the client environment, the App ID is different from the previous extension, so the old configuration/data setup may conflict with the new deployment.
What is the best approach in this situation?
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Should I keep the same App ID and treat it as an upgrade?
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If the App ID has already changed, how can I safely replace the old extension without losing configuration/data?
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What is the recommended way to handle upgrade and migration in Business Central for such major changes?
Any best practices or upgrade strategies would be highly appreciated.
Thank you.

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