Merge Blueprints Error

As far as I can recall, I was removing two objects that were directly next to each other and they were both made from slabs because I wanted to get them to merge into one item. Now it seems the game can’t build anything but prefabs.
Here are the error logs:

1/5

 > develop-2720 (x64)stonehearth/services/server/build/build_service.luac:149: attempt to index local 'building' (a nil value)stack traceback:
    > 	[C]: ?
    > 	stonehearth/services/server/build/build_service.luac:149: in function '_merge_blueprints_into'
    > 	stonehearth/services/server/build/build_service.luac:91: in function '_add_floor_type'
    > 	stonehearth/services/server/build/build_service.luac:81: in function 'add_floor'
    > 	stonehearth/services/server/build/build_service.luac:50: in function 'cb'
    > 	stonehearth/services/server/build/build_service.luac:304: in function 'do_command'
    > 	stonehearth/services/server/build/build_service.luac:50: in function <stonehearth/services/server/build>/build_service.luac:49>

2/5
> develop-2720 (x64)c++ exception: lua runtime errorstack traceback:

3/5

develop-2720 (x64)…hearth/services/server/build/build_undo_manager.luac:6: assertion failed!stack traceback:
[C]: ?
[C]: in function ‘assert’
…hearth/services/server/build/build_undo_manager.luac:6: in function 'begin_transaction’
stonehearth/services/server/build/build_service.luac:303: in function 'do_command’
stonehearth/services/server/build/build_service.luac:50: in function <stonehearth/services/server/build/build_service.luac:49>

4/5

> develop-2720 (x64)...hearth/services/server/build/build_undo_manager.luac:108: assertion failed!stack traceback:
> 	radiant/modules/events.luac:84: in function <radiant/modules/events.luac:81>
> 	[C]: in function 'assert'
> 	...hearth/services/server/build/build_undo_manager.luac:108: in function 'clear'
> 	stonehearth/services/server/build/build_service.luac:35: in function 'clear_undo_stack'
> 	stonehearth/services/server/build/build_service.luac:37: in function 'set_active'
> 	...earth/services/server/build/scaffolding_manager.luac:130: in function '_create_scaffolding_for'
> 	...earth/services/server/build/scaffolding_manager.luac:97: in function '_process_new_regions'
> 	...earth/services/server/build/scaffolding_manager.luac:93: in function 'method'
> 	radiant/modules/events.luac:43: in function 'instance'
> 	radiant/modules/events.luac:98: in function <radiant/modules/events.luac:96>
> 	[C]: in function 'xpcall'
> 	radiant/modules/events.luac:96: in function 'trigger'
> 	radiant/modules/events.luac:121: in function '_trigger_gameloop'
> 	radiant/modules/events.luac:150: in function '_update'
> 	radiant/server.luac:19: in function <radiant/server.luac:17>

5/5

develop-2720 (x64)...earth/services/server/build/scaffolding_manager.luac:95: assertion failed!stack traceback:
	radiant/modules/events.luac:84: in function <radiant/modules/events.luac:81>
	[C]: in function 'assert'
	...earth/services/server/build/scaffolding_manager.luac:95: in function '_process_new_regions'
	...earth/services/server/build/scaffolding_manager.luac:93: in function 'method'
	radiant/modules/events.luac:43: in function 'instance'
	radiant/modules/events.luac:98: in function <radiant/modules/events.luac:96>
	[C]: in function 'xpcall'
	radiant/modules/events.luac:96: in function 'trigger'
	radiant/modules/events.luac:121: in function '_trigger_gameloop'
	radiant/modules/events.luac:150: in function '_update'
	radiant/server.luac:19: in function <radiant/server.luac:17>

Hope it helps