diff --git a/extern/sector-storage/ffiwrapper/sealer_cgo.go b/extern/sector-storage/ffiwrapper/sealer_cgo.go
index 400b67211..18a4e64cb 100644
--- a/extern/sector-storage/ffiwrapper/sealer_cgo.go
+++ b/extern/sector-storage/ffiwrapper/sealer_cgo.go
@@ -15,6 +15,8 @@ import (
 	"os"
 	"runtime"
 
+	nr "github.com/filecoin-project/lotus/extern/storage-sealing/lib/nullreader"
+
 	"github.com/ipfs/go-cid"
 	"golang.org/x/xerrors"
 
@@ -369,8 +371,8 @@ func (sb *Sealer) pieceCid(spt abi.RegisteredSealProof, in []byte) (cid.Cid, err
 	return pieceCID, werr()
 }
 
-func (sb *Sealer) tryDecodeUpdatedReplica(ctx context.Context, sector storage.SectorRef, commD cid.Cid, unsealedPath string) (bool, error) {
-	paths, done, err := sb.sectors.AcquireSector(ctx, sector, storiface.FTUpdate|storiface.FTSealed|storiface.FTCache, storiface.FTNone, storiface.PathStorage)
+func (sb *Sealer) tryDecodeUpdatedReplica(ctx context.Context, sector storage.SectorRef, commD cid.Cid, unsealedPath string, randomness abi.SealRandomness) (bool, error) {
+	replicaPath, done, err := sb.sectors.AcquireSector(ctx, sector, storiface.FTUpdate|storiface.FTUpdateCache, storiface.FTNone, storiface.PathStorage)
 	if xerrors.Is(err, storiface.ErrSectorNotFound) {
 		return false, nil
 	} else if err != nil {
@@ -378,12 +380,52 @@ func (sb *Sealer) tryDecodeUpdatedReplica(ctx context.Context, sector storage.Se
 	}
 	defer done()
 
+	sealedPaths, releaseSectorKey, err := sb.AcquireSectorKeyOrRegenerate(ctx, sector, randomness)
+	if err != nil {
+		return false, xerrors.Errorf("acquiring sealed sector: %w", err)
+	}
+	defer releaseSectorKey()
+
 	// Sector data stored in replica update
 	updateProof, err := sector.ProofType.RegisteredUpdateProof()
 	if err != nil {
 		return false, err
 	}
-	return true, ffi.SectorUpdate.DecodeFrom(updateProof, unsealedPath, paths.Update, paths.Sealed, paths.Cache, commD)
+	return true, ffi.SectorUpdate.DecodeFrom(updateProof, unsealedPath, replicaPath.Update, sealedPaths.Sealed, sealedPaths.Cache, commD)
+}
+
+func (sb *Sealer) AcquireSectorKeyOrRegenerate(ctx context.Context, sector storage.SectorRef, randomness abi.SealRandomness) (storiface.SectorPaths, func(), error) {
+	paths, done, err := sb.sectors.AcquireSector(ctx, sector, storiface.FTSealed|storiface.FTCache, storiface.FTNone, storiface.PathStorage)
+	if err == nil {
+		return paths, done, err
+	} else if !xerrors.Is(err, storiface.ErrSectorNotFound) {
+		return paths, done, xerrors.Errorf("reading sector key: %w", err)
+	}
+
+	// Sector key can't be found, so let's regenerate it
+	sectorSize, err := sector.ProofType.SectorSize()
+	if err != nil {
+		return paths, done, xerrors.Errorf("retrieving sector size: %w", err)
+	}
+	paddedSize := abi.PaddedPieceSize(sectorSize)
+
+	_, err = sb.AddPiece(ctx, sector, nil, paddedSize.Unpadded(), nr.NewNullReader(paddedSize.Unpadded()))
+	if err != nil {
+		return paths, done, xerrors.Errorf("recomputing empty data: %w", err)
+	}
+
+	pc1, err := sb.SealPreCommit1(ctx, sector, randomness, []abi.PieceInfo{{PieceCID: zerocomm.ZeroPieceCommitment(paddedSize.Unpadded()), Size: paddedSize}})
+	if err != nil {
+		return paths, done, xerrors.Errorf("during pc1: %w", err)
+	}
+
+	_, err = sb.SealPreCommit2(ctx, sector, pc1)
+	if err != nil {
+		return paths, done, xerrors.Errorf("during pc2: %w", err)
+	}
+
+	// Sector key should exist now, let's grab the paths
+	return sb.sectors.AcquireSector(ctx, sector, storiface.FTSealed|storiface.FTCache, storiface.FTNone, storiface.PathStorage)
 }
 
 func (sb *Sealer) UnsealPiece(ctx context.Context, sector storage.SectorRef, offset storiface.UnpaddedByteIndex, size abi.UnpaddedPieceSize, randomness abi.SealRandomness, commd cid.Cid) error {
@@ -437,7 +479,7 @@ func (sb *Sealer) UnsealPiece(ctx context.Context, sector storage.SectorRef, off
 	}
 
 	// If piece data stored in updated replica decode whole sector
-	decoded, err := sb.tryDecodeUpdatedReplica(ctx, sector, commd, unsealedPath.Unsealed)
+	decoded, err := sb.tryDecodeUpdatedReplica(ctx, sector, commd, unsealedPath.Unsealed, randomness)
 	if err != nil {
 		return xerrors.Errorf("decoding sector from replica: %w", err)
 	}
diff --git a/extern/sector-storage/manager.go b/extern/sector-storage/manager.go
index 4b52f9a1d..10869a65f 100644
--- a/extern/sector-storage/manager.go
+++ b/extern/sector-storage/manager.go
@@ -273,7 +273,7 @@ func (m *Manager) SectorsUnsealPiece(ctx context.Context, sector storage.SectorR
 	defer cancel()
 
 	log.Debugf("acquire unseal sector lock for sector %d", sector.ID)
-	if err := m.index.StorageLock(ctx, sector.ID, storiface.FTSealed|storiface.FTCache, storiface.FTUnsealed); err != nil {
+	if err := m.index.StorageLock(ctx, sector.ID, storiface.FTSealed|storiface.FTCache|storiface.FTUpdate|storiface.FTUpdateCache, storiface.FTUnsealed); err != nil {
 		return xerrors.Errorf("acquiring unseal sector lock: %w", err)
 	}
 
@@ -281,8 +281,12 @@ func (m *Manager) SectorsUnsealPiece(ctx context.Context, sector storage.SectorR
 	// put it in the sealing scratch space.
 	sealFetch := func(ctx context.Context, worker Worker) error {
 		log.Debugf("copy sealed/cache sector data for sector %d", sector.ID)
-		if _, err := m.waitSimpleCall(ctx)(worker.Fetch(ctx, sector, storiface.FTSealed|storiface.FTCache, storiface.PathSealing, storiface.AcquireCopy)); err != nil {
-			return xerrors.Errorf("copy sealed/cache sector data: %w", err)
+		_, err := m.waitSimpleCall(ctx)(worker.Fetch(ctx, sector, storiface.FTSealed|storiface.FTCache, storiface.PathSealing, storiface.AcquireCopy))
+		if err != nil {
+			_, err2 := m.waitSimpleCall(ctx)(worker.Fetch(ctx, sector, storiface.FTUpdate|storiface.FTUpdateCache, storiface.PathSealing, storiface.AcquireCopy))
+			if err2 != nil {
+				return xerrors.Errorf("copy sealed/cache sector data: %w %w", err, err2)
+			}
 		}
 
 		return nil
diff --git a/extern/sector-storage/manager_test.go b/extern/sector-storage/manager_test.go
index 9c844292e..d9f8af461 100644
--- a/extern/sector-storage/manager_test.go
+++ b/extern/sector-storage/manager_test.go
@@ -315,6 +315,12 @@ func TestSnapDeals(t *testing.T) {
 	require.NoError(t, m.GenerateSectorKeyFromData(ctx, sid, out.NewUnsealed))
 	fmt.Printf("GSK duration (%s): %s\n", ss.ShortString(), time.Since(startGSK))
 
+	fmt.Printf("Remove data\n")
+	require.NoError(t, m.FinalizeSector(ctx, sid, nil))
+	fmt.Printf("Release Sector Key\n")
+	require.NoError(t, m.ReleaseSectorKey(ctx, sid))
+	fmt.Printf("Unseal Replica\n")
+	require.NoError(t, m.SectorsUnsealPiece(ctx, sid, 0, p1.Size.Unpadded(), ticket, &out.NewUnsealed))
 }
 
 func TestRedoPC1(t *testing.T) {