diff --git a/src/Storages/StorageMergeTree.cpp b/src/Storages/StorageMergeTree.cpp
index 32e100edc4d..a279291aef1 100644
--- a/src/Storages/StorageMergeTree.cpp
+++ b/src/Storages/StorageMergeTree.cpp
@@ -1154,16 +1154,25 @@ MergeMutateSelectedEntryPtr StorageMergeTree::selectPartsToMutate(
         }
 
         TransactionID first_mutation_tid = mutations_begin_it->second.tid;
-        MergeTreeTransactionPtr txn = tryGetTransactionForMutation(mutations_begin_it->second, log);
-        assert(txn || first_mutation_tid.isPrehistoric());
+        MergeTreeTransactionPtr txn;
 
-        if (txn)
+        if (!first_mutation_tid.isPrehistoric())
         {
+
             /// Mutate visible parts only
             /// NOTE Do not mutate visible parts in Outdated state, because it does not make sense:
             /// mutation will fail anyway due to serialization error.
-            if (!part->version.isVisible(*txn))
+
+            /// It's possible that both mutation and transaction are already finished,
+            /// because that part should not be mutated because it was not visible for that transaction.
+            if (!part->version.isVisible(first_mutation_tid.start_csn, first_mutation_tid))
                 continue;
+
+            txn = tryGetTransactionForMutation(mutations_begin_it->second, log);
+            if (!txn)
+                throw Exception(ErrorCodes::LOGICAL_ERROR, "Cannot find transaction {} that has started mutation {} "
+                                "that is going to be applied to part {}",
+                                first_mutation_tid, mutations_begin_it->second.file_name, part->name);
         }
 
         auto commands = std::make_shared<MutationCommands>();
diff --git a/tests/queries/0_stateless/01168_mutations_isolation.reference b/tests/queries/0_stateless/01168_mutations_isolation.reference
index f9ebd1c5f83..44da63385ca 100644
--- a/tests/queries/0_stateless/01168_mutations_isolation.reference
+++ b/tests/queries/0_stateless/01168_mutations_isolation.reference
@@ -36,3 +36,5 @@ tx14	10	22	all_1_14_2_18
 tx14	10	42	all_1_14_2_18
 tx14	10	62	all_1_14_2_18
 tx14	10	82	all_1_14_2_18
+11	2	all_2_2_0
+11	10	all_1_1_0_3
diff --git a/tests/queries/0_stateless/01168_mutations_isolation.sh b/tests/queries/0_stateless/01168_mutations_isolation.sh
index 5d014e030f1..2b76e5742ac 100755
--- a/tests/queries/0_stateless/01168_mutations_isolation.sh
+++ b/tests/queries/0_stateless/01168_mutations_isolation.sh
@@ -94,3 +94,16 @@ tx 14 "begin transaction"
 tx 14 "select 10, n, _part from mt order by n" | accept_both_parts
 
 $CLICKHOUSE_CLIENT --database_atomic_wait_for_drop_and_detach_synchronously=0 -q "drop table mt"
+
+$CLICKHOUSE_CLIENT -q "create table mt (n int) engine=MergeTree order by tuple()"
+$CLICKHOUSE_CLIENT --implicit_transaction=1 -q "insert into mt values (1)"
+
+tx 15 "begin transaction"
+tx 16                                           "begin transaction"
+tx 16                                           "insert into mt values (2)"
+tx 15 "alter table mt update n = 10*n where 1"
+tx 15 "commit"
+tx 16                                           "commit"
+$CLICKHOUSE_CLIENT --implicit_transaction=1 -q "select 11, n, _part from mt order by n"
+
+$CLICKHOUSE_CLIENT -q "drop table mt"