diff --git a/src/GeniusYield/TxBuilder/Common.hs b/src/GeniusYield/TxBuilder/Common.hs
index 19a985b3..08edb677 100644
--- a/src/GeniusYield/TxBuilder/Common.hs
+++ b/src/GeniusYield/TxBuilder/Common.hs
@@ -255,25 +255,27 @@ buildTxCore ss eh pp ps cstrat ownUtxoUpdateF addrs change reservedCollateral sk
             gytxVotingProcedures' = case gytxVotingProcedures of GYTxSkeletonVotingProceduresNone -> mempty; GYTxSkeletonVotingProcedures vp -> vp
             gytxProposalProcedures' = case gytxProposalProcedures of GYTxSkeletonProposalProceduresNone -> mempty; GYTxSkeletonProposalProcedures pps -> pps
             refIns =
-              gyTxSkeletonRefInsToList gytxRefIns
-                <> [ r
-                   | GYTxIn {gyTxInWitness = wit} <- gytxIns
-                   , r <- case wit of
-                      GYTxInWitnessScript (GYBuildPlutusScriptReference r _) _ _ -> [r]
-                      GYTxInWitnessSimpleScript (GYBuildSimpleScriptReference r _) -> [r]
-                      _anyOther -> []
-                   ]
-                <> [ r
-                   | wit <- Map.keys gytxMint
-                   , r <- case wit of
-                      GYBuildPlutusScript (GYBuildPlutusScriptReference r _) -> [r]
-                      GYBuildSimpleScript (GYBuildSimpleScriptReference r _) -> [r]
-                      _anyOther -> []
-                   ]
-                <> [r | wdrl <- gytxWdrls, r <- maybeToList (extractReferenceFromWitness $ gyTxWdrlWitness wdrl)]
-                <> [r | cert <- gytxCerts, r <- maybeToList (gyTxCertWitness cert >>= extractReferenceFromWitness)]
-                <> [r | votingWit <- map fst (Map.elems gytxVotingProcedures'), r <- maybeToList (extractReferenceFromWitness votingWit)]
-                <> [r | propProc <- gytxProposalProcedures', r <- maybeToList (extractReferenceFromWitness $ snd propProc)]
+              -- We want to filter out the references that are already in the txIns.
+              filter (\oref -> all (\txIn -> gyTxInTxOutRef txIn /= oref) gytxIns) $
+                gyTxSkeletonRefInsToList gytxRefIns
+                  <> [ r
+                     | GYTxIn {gyTxInWitness = wit} <- gytxIns
+                     , r <- case wit of
+                        GYTxInWitnessScript (GYBuildPlutusScriptReference r _) _ _ -> [r]
+                        GYTxInWitnessSimpleScript (GYBuildSimpleScriptReference r _) -> [r]
+                        _anyOther -> []
+                     ]
+                  <> [ r
+                     | wit <- Map.keys gytxMint
+                     , r <- case wit of
+                        GYBuildPlutusScript (GYBuildPlutusScriptReference r _) -> [r]
+                        GYBuildSimpleScript (GYBuildSimpleScriptReference r _) -> [r]
+                        _anyOther -> []
+                     ]
+                  <> [r | wdrl <- gytxWdrls, r <- maybeToList (extractReferenceFromWitness $ gyTxWdrlWitness wdrl)]
+                  <> [r | cert <- gytxCerts, r <- maybeToList (gyTxCertWitness cert >>= extractReferenceFromWitness)]
+                  <> [r | votingWit <- map fst (Map.elems gytxVotingProcedures'), r <- maybeToList (extractReferenceFromWitness votingWit)]
+                  <> [r | propProc <- gytxProposalProcedures', r <- maybeToList (extractReferenceFromWitness $ snd propProc)]
 
         allRefUtxos <-
           utxosAtTxOutRefs $