Description of problem:

Clair failed to scan image vulnerability with Quay v3.4.4

Version-Release number of selected component (if applicable):

'registry-proxy.engineering.redhat.com/rh-osbs/quay-clair-rhel8@sha256:7504652d7795d813eae5ac1df1fbc6945acdf6cd0216370298e0ff27524f17fd',
'registry-proxy.engineering.redhat.com/rh-osbs/quay-clair-rhel8:v3.4.4-1'

How reproducible:

Always

Steps to Reproduce:
1. Deploy quay v3.4.2 with clair
2. Push image registry.redhat.io/quay/quay-rhel8:v3.4.3 to quay, check image vulnerability
3. Upgrade quay with clair to v3.4.3, check again

4. Upgrade quay with clair to v3.4.4, check again

Actual results:

Unable to scan vulnerability

Expected results:

Show correct vulnerability

Additional info:

logs in clair

{"level":"error","component":"init/NewHttpTransport","component":"libindex/Libindex.Index","manifest":"sha256:8619161ba64d4ca3c016dd06234da99b8bed01f334250311f6e300cac4aeebaa","component":"libindex/Libindex.index","component":"internal/indexer/controller/Controller.Index","manifest":"sha256:8619161ba64d4ca3c016dd06234da99b8bed01f334250311f6e300cac4aeebaa","state":"CheckManifest","error":"failed finish scann. attempt a rescan of the manifest: store:storeManifest failed to link manifest with scanner list: ERROR: duplicate key value violates unique constraint \"scanned_manifest_pkey\" (SQLSTATE 23505)","time":"2021-04-16T03:24:21Z","time":"2021-04-16T03:24:21Z","message":"error during scan"}