Did you create the original asset you have modified or did you modify it from the DLS or another source? Is it a clone of an original asset?
The only thing that comes to mind is a conflict with the original asset kuid code and the one in your modified version.
I note that 977482 is your userid code. If you have cloned or modified an asset created by someone else then your modified asset should have a new kuid which will include 977482
Open the config.txt file and check that the asset has the correct kuid code (i.e. with 977482). This will be found in two places, both must have the same value.
The tag "kuid" should have a value "<kuid:977482:xxxxx>" where "xxxxx" should be 100761.
The "kuid-table" (usually at or near the end of the file) should have as one of its entries the same kuid value "<kuid:977482:xxxxx>"
My theory anyway. I could, of course, be totally off the mark.