Hi,
Without any changes it won't disappear.
please check with basis(applied any notes/patches) and bw team whoever accesses bwq in last week.
What actions they performed on quality. if any FI was changed/transported related to SL(special ledger), that may causes.
you may have same data source at Dev system.
if yes then you can transport from dev to quality.
if you at prod, also you can do reverse transport; prod to quality with help of basis team.
if doesn't exist at dev and prod then create same data source at dev and do the transport to quality.
Thanks