Pymatgen error when using qlaunch

Hello, I am now pretty sure taht 4 of my FW ended up being “RESERVED” due to a pymatgen issue and are not “accessible” at all, hence are blocking my fireworks.
Here’s what I have done:

 query = { 'state' : {"$nin" : [ 'ARCHIVED', 'DEFUSED', 'FIZZLED', 'COMPLETED' ] }}

In [34]: all_idx = lpad.get_fw_ids(query)

In [35]: failed_idx = []

In [36]: for idx in all_idx:
    ...:     try:
    ...:         lpad.get_fw_by_id(idx)
    ...:     except:
    ...:         failed_idx.append(idx)
    ...:         fw_dict = lpad.get_fw_dict_by_id(idx)
    ...:         print(idx, fw_dict['state'])   

21780 RESERVED
21728 RESERVED
21726 RESERVED
21724 RESERVED
21884 READY
...
21772 READY

In [38]: len(failed_idx)
Out[38]: 27

In [39]: len(all_idx)
Out[39]: 110

I haven’t try to delete these FW, since I am afraid of ending up here again Deleting fireworks

Thank you for your suggestions,
Marco