Can not unlink the file
I have a indd file and have 3 to 4 AI file placed in it. when i open this indd file it gives me following message

i tried both option and have not noticed any diffference between the 2 options.
my links panel looks like this

sudoku med(4).ai is the file thats is problematic. I have relinked to itself as well as relink to several other files but nothing change my links panel looks same.
I tried Go to link option but nothing changed
I have completed my doc with al the cross references considering that i can unlink file later after searching online how to unlink/delete linked file.
so what should i do. suggest something that i dont have create the from file from scratch if possible.
