How to delete broken reference in assembly ?

Hello all,

I needed another help regarding to the solid works part modelling.

When I opened an part and check  the references  (file>find reference) it shows another reference of assembly as not opened and also path of these parts is shown as File not found (see attached snap-shot)

How can I removed this assembly  references?

Previously  I faced same condition in assembly where in references of some of the parts shown as "not open" but in that case these parts were present in my feature manager tree,so when I deleted that part references got removed.

But thats not the case in part modelling.

Any idea how to do it ?

SolidworksDrawings And Detailing