[Turk][Bug Report] Move finished with non empty replacement set

## Type of Issue

Select the type of issue:
- [x] Bug report (to report a bug)
- [ ] Feature request (to request an additional feature)
- [ ] Tracker (I am just using this as a tracker)
- [ ] Refactor request
- [ ] Documentation Ask

## Description
"move 3 steps" failed with this trace. From Turk logs.

```
2021-04-13 14:38:48,749 [nsp_dialogue_manager.py:333 - get_logical_form() INFO]: Querying the semantic parsing model
INFO:root:Incoming chats: [' Move 3 steps']
2021-04-13 14:38:55,780 [loco_mc_agent.py:269 - controller_step() INFO]: Incoming chats: [' Move 3 steps']
INFO:root:Querying the semantic parsing model
2021-04-13 14:38:58,605 [nsp_dialogue_manager.py:333 - get_logical_form() INFO]: Querying the semantic parsing model
INFO:root:logical form post-coref "c60dcfbd955f12aaa6854da4e03bd5e83d47c08ddf237b0250c598e82e7074dd:b3adc15fc6d24c1ebab4b6f6d978b29c" -> {'dialogue_type': 'HUMAN_GIVE_COMMAND', 'action_sequence': [{'action_type': 'MOVE', 'location': {'reference_object': {'special_reference': 'AGENT'}, 'relative_direction': 'DOWN', 'steps': '3', 'text_span': '3 step'}}]}
2021-04-13 14:39:06,741 [nsp_dialogue_manager.py:172 - handle_logical_form() INFO]: logical form post-coref "c60dcfbd955f12aaa6854da4e03bd5e83d47c08ddf237b0250c598e82e7074dd:b3adc15fc6d24c1ebab4b6f6d978b29c" -> {'dialogue_type': 'HUMAN_GIVE_COMMAND', 'action_sequence': [{'action_type': 'MOVE', 'location': {'reference_object': {'special_reference': 'AGENT'}, 'relative_direction': 'DOWN', 'steps': '3', 'text_span': '3 step'}}]}
INFO:root:update_recent_entities []
2021-04-13 14:39:06,742 [sql_memory.py:208 - update_recent_entities() INFO]: update_recent_entities []
ERROR:root:Move finished with non-empty replace set: {((0, 62, 0), (2, 0)), ((0, 61, 0), (3, 0))}
2021-04-13 14:39:11,203 [tasks.py:235 - step() ERROR]: Move finished with non-empty replace set: {((0, 62, 0), (2, 0)), ((0, 61, 0), (3, 0))}
```