Thanks @Micah Timbol-Oracle . I think I found where the issue was. The second depreciation method should have the "End Period Number" field empty since there isn't a next depreciation method after that. Once I removed the figure, there is no more error. Thanks a lot for your help anyway!

Thanks @Micah Timbol-Oracle. All 3 assets have been uploaded using csv. And the fact that after I changed the depreciation method for the first asset, the error (for that asset) disappeared made me believe that the error is related to the depreciation method.

Thanks @Micah Timbol-Oracle : I've followed your instruction to check but both assets have the parent asset in the FAM asset value records. What else can cause this issue please?

Thanks a lot @Micah Timbol-Oracle & @Angelica Mae Segador-Oracle. Here is a screenshot when I clicked on the "Errors:2" link: