Does anyone know what this last exception means?

<?xml version="1.0" ?><root>
<report><version>2</version><sessionid>47479893038ea90f641cc45c</sessionid><type>desync</type><sku>ea.maxis.sims4_64.15.pc</sku><createtime>2023-03-23 16:31:02</createtime><buildsignature>Local.Unknown.Unknown.1.96.365.1030-1.200.000.584.Release</buildsignature><categoryid>aging_data.py:134</categoryid><desyncid>47479893038ea90f641cc45c</desyncid><systemconfig/><screenshot/><desyncdata>[manus] Sim 627988949414739513 failed to load (KeyError: &lt;Age.INFANT = 128&gt; )&#13;&#10;Traceback (most recent call last):&#13;&#10;&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 117, in wrapped&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 113, in finally_wrap&#13;&#10; File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 157, in wrapper&#13;&#10; File "T:\InGame\Gameplay\Scripts\Core\sims4\utils.py", line 175, in wrapper&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\areaserver.py", line 365, in c_api_client_connect&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone.py", line 599, in do_zone_spin_up&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 1589, in update&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\zone_spin_up_service.py", line 248, in on_enter&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\sims\household_manager.py", line 89, in load_households&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\sims\household_manager.py", line 182, in _load_household_from_household_proto&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\sims\household.py", line 1513, in load_data&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 3384, in load_sim_info&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\sims\sim_info.py", line 3572, in _load_sim_info&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 1269, in set_load_in_progress&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\traits\trait_tracker.py", line 610, in _apply_trait&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\sims\aging\aging_mixin.py", line 199, in get_age_transition_data&#13;&#10; File "T:\InGame\Gameplay\Scripts\Server\sims\aging\aging_data.py", line 134, in get_age_transition_data&#13;&#10;KeyError: &lt;Age.INFANT = 128&gt;rtim=0&#13;&#10;Client Session Time: 33.91&#13; &#10;Num Save Errors: 0&#13; &#10;Num Load Errors: 0&#13; &#10;Current Game State: 0x96d01090&#13; &#10;LoadingScreenActiveFlag: 1&#13; &#10;Origin Version: 12,140,0,5397&#13; &#10;Modded: True&#13; &#10;SystemInfo: Windows 11 10.0.22621 GPU: Radeon RX 580 Series aticfx64.dll 31.0.12027.7000, GUID: D7B71EE2-249F-11CF-A160-CB5E48C2D235&#13; &#10;</desyncdata></report>
</root>