Report unexpected duplicate when update partition tables during add column.

[Defined2014]

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

func TestUpdateMultiplePartitionTable(t *testing.T) {
    store := testkit.CreateMockStore(t)
    tk := testkit.NewTestKit(t, store)
    tk.MustExec("use test")
    tk.MustExec("create table t1 (c1 int, c2 int) partition by hash (c1) partitions 16")
    tk.MustExec("insert t1 values (1, 1), (2, 2)")
    tk.MustExec("create table t2 (c1 int, c2 int) partition by hash (c1) partitions 16")
    tk.MustExec("insert t2 values (1, 3), (2, 5)")
    tk2 := testkit.NewTestKit(t, store)
    tk2.MustExec("use test")

    testfailpoint.EnableCall(t, "github.com/pingcap/tidb/pkg/ddl/onJobUpdated", func(job *model.Job) {
        if job.SchemaState == model.StateWriteOnly {
            tk2.MustExec("update t1, t2 set t1.c1 = 8, t2.c2 = 10 where t1.c2 = t2.c1")
            tk2.MustQuery("select * from t1").Sort().Check(testkit.Rows("8 1", "8 2"))
            tk2.MustQuery("select * from t2").Sort().Check(testkit.Rows("1 10", "2 10"))
        }
    })

    tk.MustExec("alter table t1 add column c3 bigint default 9")

    tk.MustQuery("select * from t1").Sort().Check(testkit.Rows("8 1 9", "8 2 9"))
}

2. What did you expect to see? (Required)

test pass

3. What did you see instead (Required)

test failed

4. What is your TiDB version? (Required)