Some custom nodes broken after Jan 5, 2026 updates (comfy.ldm.lightricks.model)

[ostap667inbox]

Custom Node Testing

• I have tried disabling custom nodes and the issue persists (see how to disable custom nodes if you need help)

Expected Behavior

Actual Behavior

Steps to Reproduce

At least two nodes stopped working: ComfyUI-TeaCache and ComfyUI-MagCache.
The error when starting ComfyUI is the same:

ComfyUI-MagCache:

Traceback (most recent call last):
  File "D:\ComfyUI\ComfyUI\nodes.py", line 2155, in load_custom_node
    module_spec.loader.exec_module(module)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
  File "<frozen importlib._bootstrap_external>", line 1027, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "D:\ComfyUI\ComfyUI\custom_nodes\ComfyUI-MagCache\__init__.py", line 1, in <module>
    from .nodes import NODE_CLASS_MAPPINGS as NODES_CLASS, NODE_DISPLAY_NAME_MAPPINGS as NODES_DISPLAY
  File "D:\ComfyUI\ComfyUI\custom_nodes\ComfyUI-MagCache\nodes.py", line 13, in <module>
    from comfy.ldm.lightricks.model import precompute_freqs_cis
ImportError: cannot import name 'precompute_freqs_cis' from 'comfy.ldm.lightricks.model' (D:\ComfyUI\ComfyUI\comfy\ldm\lightricks\model.py)

ComfyUI-TeaCache:

Traceback (most recent call last):
  File "D:\ComfyUI\ComfyUI\nodes.py", line 2155, in load_custom_node
    module_spec.loader.exec_module(module)
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^
  File "<frozen importlib._bootstrap_external>", line 1027, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "D:\ComfyUI\ComfyUI\custom_nodes\teacache\__init__.py", line 1, in <module>
    from .nodes import NODE_CLASS_MAPPINGS as NODES_CLASS, NODE_DISPLAY_NAME_MAPPINGS as NODES_DISPLAY
  File "D:\ComfyUI\ComfyUI\custom_nodes\teacache\nodes.py", line 12, in <module>
    from comfy.ldm.lightricks.model import precompute_freqs_cis
ImportError: cannot import name 'precompute_freqs_cis' from 'comfy.ldm.lightricks.model' (D:\ComfyUI\ComfyUI\comfy\ldm\lightricks\model.py)

Debug Logs

-

Other

No response

[FurkanGozukara]

yes i hope this gets fixed

welltop-cn/ComfyUI-TeaCache#178

[elcire]

In the meantime, I work around would be appreciated! thanks

[GabrielR]

A set towards a workaround:

NOTE: THIS IS TO HELP FIX MAGCACHE AND NOT CHANGES FOR COMFYUI

Teacache, MagCache and LightSpeed were all broken by this update. I've pasted a link to the workaround for Teacache, which will hopefully help fix MagCache. They changed two lines. The first is an updated library import so we're loading the new library, then fixing a function call to match the new parameters.

welltop-cn/ComfyUI-TeaCache#178 (comment)

It has been reported these instructions can be used to also fix Magcache. Hopefully this will be useful to one of the Magcache experts here

[JackenHsu]

A set towards a workaround:

NOTE: THIS IS TO HELP FIX MAGCACHE AND NOT CHANGES FOR COMFYUI

Teacache, MagCache and LightSpeed were all broken by this update. I've pasted a link to the workaround for Teacache, which will hopefully help fix MagCache. They changed two lines. The first is an updated library import so we're loading the new library, then fixing a function call to match the new parameters.

welltop-cn/ComfyUI-TeaCache#178 (comment)

It has been reported these instructions can be used to also fix Magcache. Hopefully this will be useful to one of the Magcache experts here

Thanks. It works!

[Booyaka101]

For anyone landing here later, the cause is f2b0023 (PR #11632, "Support the LTXV 2 model.", merged Jan 5). It deleted the module-level precompute_freqs_cis from comfy/ldm/lightricks/model.py and replaced it with a private _precompute_freqs_cis method on the model class. Last release with the importable function is v0.7.0, first one without it is v0.8.0.

Worth flagging because the name still appears twice in that file either way, so searching for it turns up hits on both v0.7.0 and v0.8.0 and makes it look like nothing changed. Only the top-level def went away.

The patch in welltop-cn/ComfyUI-TeaCache#178 is the real fix. Pinning ComfyUI isn't practical this far along. And neither pack looks likely to ship a fix on its own: TeaCache's last commit is 2025-07-12, MagCache's is 2025-11-27.