Crystal report sp21 and sp29

Hello
I have created awhile ago in VS2017 an application [application A] with CR sp21 which works fine.
Now Ihave another application [application B] created in vs2019 with CR sp29.
When I install app B on the same pc where App A is installed the CR wont work so I installed CR runtime sp29 and app B works, but app A returns an error see attach.
How can I have both app working.

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