How to import project 1 to another project , with same name of script with unique namespaces and different root folder?

Hello Everyone,
My Issue is: My packages are created with different root names with unique namespaces, scripts are located in different subfolders, but during import, all moved to the Scripts of the first one package. can you please help me how to solve this issue? Thanks,

Assets/Project1/Script1.cs -// with I have adding namespace namespace_proj1{ }
and second one is,
Assets/Project2/Script1.cs -// with I have adding namespace namespace_proj2{ }

Please help me,

Since the Import brings in the structure it was saved in, you could try moving all your Project 1 folders into a Temp folder. Then after importing Project 2, manually move the folders/files from the Temp into the imported structure.