Error when targeting a token with tagged target modifiers

[devakm]

Adding Blur as an Active Effect using the editor in the Character Sheet, I keep getting this error in Effect Modifiers:

The error triggers if I target the token that has Blur Active Effect and then select a token to make an attack on that target, or any similar order.

Key point is that it seems to break when trying to load the custom active affect into Effect Modifiers window.

If I disable that Blur Active Effect the Effect Modifiers stops throwing an error and works as expected.

{
  "disabled": false,
  "name": "Blur",
  "img": "icons/svg/aura.svg",
  "_id": "BiqHW6hh8a3RzrLn",
  "type": "base",
  "system": {},
  "changes": [
    {
      "key": "system.conditions.target.modifiers",
      "mode": 2,
      "value": "-3 to hit Blur #hit @eft:BiqHW6hh8a3RzrLn",
      "priority": null
    }
  ],
  "duration": {
    "startTime": null,
    "seconds": null,
    "combat": null,
    "rounds": null,
    "turns": null,
    "startRound": null,
    "startTurn": null
  },
  "description": "",
  "origin": null,
  "tint": "#ffffff",
  "transfer": false,
  "statuses": [],
  "sort": 0,
  "flags": {
    "gurps": {
      "duration": {
        "delaySeconds": null
      }
    }
  },
  "_stats": {
    "compendiumSource": null,
    "duplicateSource": null,
    "coreVersion": "12.331",
    "systemId": "gurps",
    "systemVersion": "0.17.17-rc.3",
    "createdTime": 1737235172671,
    "modifiedTime": 1737235862042,
    "lastModifiedBy": "sVxF0AzuvK7ZMqXx"
  }
}

[chrismaille]

Fixed:

[devakm]

Verified fix using patch f8b41fe