Library Overrides it's blocking my animation frames

So i’ve been searching on forums about problems with library overrides but i didn’t find any related with animation keyframes. So, here i am.

I’m animating a character linked on a scene and with Make > Selected & Content option on of Library Overrides. So far, ok.

Until, out of NOWHERE (or i end up clicking on a shortcut by accident i don’t know) my keyframes are blocked and the message “Can’t edit this property form a linked data-block” and “there’s no animation data to operate on” appears in all of them.

Please help i’ve gone crazy with this and i don’t want to lost animation anymore ;-;

Does this happen with every controller ?
Can you inspect your file in the outliner, “library overrides” mode ? what do you see ?
Also check that you haven’t moved some of your controllers on a protected layer by accident, in the rig file.

1 - Yes, it’s like my animation is exported somehow and i can’t edit the armature pose anymore, just “add” more keyframes above (ex: i have a Z location keyframe, if i try to edit it, the z location is added to the new values i’m changing above, that is, i will have two z values on top of each other ). The only thing i can do is edit the movement values directly on Graph Editor, but i cant edit the Interpolation mode, modifers or move the keyframes in Timeline.

I noticed today that if i relink the same collection the animation that was blocked still maintains, what makes me think that is really a accident exportation.

2 - In Library Overrides mode appears my armature and pose linked.

3 - My rig it’s ok too

Just making sure -the action is not from the linked file, right?

Can you show a capture? I don’t understand this bit