**Describe the bug**
```
5828589:2021.04.27 03:13:08.824665 [ 6101 ] {} <Trace> test_27.concurrent_alter_add_drop_3 (825021f7-129f-4841-ad6b-92215e3f1a94): Renaming temporary part tmp_merge_all_0_4_7_17 to all_0_4_7_17.
5828590:2021.04.27 03:13:08.824778 [ 3358 ] {} <Trace> test_27.concurrent_alter_add_drop_2 (f0a064d0-dc89-4710-9781-a49bb0c16461): Renaming temporary part tmp_merge_all_0_4_7_17 to all_0_4_7_17.
5828591:2021.04.27 03:13:08.824823 [ 6101 ] {} <Warning> test_27.concurrent_alter_add_drop_3 (825021f7-129f-4841-ad6b-92215e3f1a94): Tried to add obsolete part all_0_4_7_17 covered by all_0_4_13_34 (state Committed)
5828623:2021.04.27 03:13:08.824951 [ 3358 ] {} <Warning> test_27.concurrent_alter_add_drop_2 (f0a064d0-dc89-4710-9781-a49bb0c16461): Tried to add obsolete part all_0_4_7_17 covered by all_0_4_13_34 (state Committed)
5828624:2021.04.27 03:13:08.824995 [ 6101 ] {} <Warning> test_27.concurrent_alter_add_drop_3 (825021f7-129f-4841-ad6b-92215e3f1a94) (MergerMutator): Unexpected number of parts removed when adding all_0_4_7_17: 0 instead of 1
5828625:2021.04.27 03:13:08.825147 [ 3358 ] {} <Warning> test_27.concurrent_alter_add_drop_2 (f0a064d0-dc89-4710-9781-a49bb0c16461) (MergerMutator): Unexpected number of parts removed when adding all_0_4_7_17: 0 instead of 1
5828643:2021.04.27 03:13:08.831273 [ 3358 ] {} <Trace> test_27.concurrent_alter_add_drop_2 (f0a064d0-dc89-4710-9781-a49bb0c16461): Trying to immediately remove part all_0_4_7_17 (state Temporary)
5828644:2021.04.27 03:13:08.831658 [ 3358 ] {} <Fatal> : Logical error: 'Part all_0_4_7_17 doesn't exist'.
5828648:2021.04.27 03:13:08.832767 [ 6101 ] {} <Trace> test_27.concurrent_alter_add_drop_3 (825021f7-129f-4841-ad6b-92215e3f1a94): Trying to immediately remove part all_0_4_7_17 (state Temporary)
5828649:2021.04.27 03:13:08.833210 [ 6101 ] {} <Fatal> : Logical error: 'Part all_0_4_7_17 doesn't exist'.

```

https://clickhouse-test-reports.s3.yandex.net/0/9bb4d8769f1064ada4cce6b26d8ff61c11356965/stress_test_(debug).html#fail1
auto new_required_columns = candidate.before_where->foldActionsByProjection(
                required_columns,
                projection.sample_block_for_keys,
                candidate.where_column_name);
            if (new_required_columns.empty() && !required_columns.empty())
                return false;
            required_columns = std::move(new_required_columns);
            candidate.before_where->addAggregatesViaProjection(aggregates);
        }
        if (analysis_result.prewhere_info)
        {
            candidate.prewhere_info = analysis_result.prewhere_info;
            auto prewhere_actions = candidate.prewhere_info->prewhere_actions->clone();
            auto prewhere_required_columns = required_columns;
            /
            for (const auto & column : prewhere_actions->getResultColumns())
                required_columns.erase(column.name);
            {
                /
                auto new_prewhere_required_columns = prewhere_actions->foldActionsByProjection(
                        prewhere_required_columns, projection.sample_block_for_keys, candidate.prewhere_info->prewhere_column_name, false);
                if (new_prewhere_required_columns.empty() && !prewhere_required_columns.empty())
                    return false;
                prewhere_required_columns = std::move(new_prewhere_required_columns);
                candidate.prewhere_info->prewhere_actions = prewhere_actions;
            }
            if (candidate.prewhere_info->row_level_filter)
            {
                auto row_level_filter_actions = candidate.prewhere_info->row_level_filter->clone();
                auto new_prewhere_required_columns = row_level_filter_actions->foldActionsByProjection(