partial fix

beacon-chain/core/helpers/beacon_committee.go

@@ -282,7 +282,7 @@ type CommitteeAssignment struct {
 // than or equal to the minimum valid start slot calculated based on the state's current slot and historical roots.
 func VerifyAssignmentEpoch(epoch primitives.Epoch, state state.BeaconState) error {
 	nextEpoch := time.NextEpoch(state)
-	if epoch > nextEpoch {
+	if epoch > nextEpoch && state.Version() < version.Fulu { // due to fulu not transitioning the state forward and using the proposer look ahead instead
 		return fmt.Errorf("epoch %d can't be greater than next epoch %d", epoch, nextEpoch)
 	}
 

beacon-chain/rpc/eth/validator/handlers.go

@@ -1030,7 +1030,7 @@ func (s *Server) GetProposerDuties(w http.ResponseWriter, r *http.Request) {
 			return
 		}
 		// Advance state with empty transitions up to the requested epoch start slot for pre fulu state only. Fulu state utilizes proposer look ahead field.
-		if st.Slot() < epochStartSlot && st.Version() != version.Fulu {
+		if st.Slot() < epochStartSlot && st.Version() < version.Fulu {
 			headRoot, err := s.HeadFetcher.HeadRoot(ctx)
 			if err != nil {
 				httputil.HandleError(w, fmt.Sprintf("Could not get head root: %v ", err), http.StatusInternalServerError)