diff --git a/backend/pkg/commons/db/bigtable.go b/backend/pkg/commons/db/bigtable.go
index c7a09b2c3..ff4de7833 100644
--- a/backend/pkg/commons/db/bigtable.go
+++ b/backend/pkg/commons/db/bigtable.go
@@ -618,7 +618,7 @@ func (bigtable *Bigtable) SaveAttestationDuties(duties map[types.Slot]map[types.
 
 				mutsInclusionSlot.Add(key, mutInclusionSlot)
 
-				if inclusionSlot != MAX_CL_BLOCK_NUMBER && uint64(attestedSlot) > bigtable.LastAttestationCache[uint64(validator)] {
+				if inclusionSlot != MAX_CL_BLOCK_NUMBER && inclusionSlot != attestedSlot && uint64(attestedSlot) > bigtable.LastAttestationCache[uint64(validator)] {
 					mutLastAttestationSlot.Set(ATTESTATIONS_FAMILY, fmt.Sprintf("%d", validator), gcp_bigtable.Timestamp((attestedSlot)*1000), []byte{})
 					bigtable.LastAttestationCache[uint64(validator)] = uint64(attestedSlot)
 					mutLastAttestationSlotCount++