Pickup animation with IK

Hello, first of all excuse me for my English.

I have an item (container) which is stored in the toolbar and visible in the hands. This item has points that my IK hands target with the weight at 1.

Now I have an animation for picking up the item which targets the IK points, the weight property is managed by the clip. When my state changes to IDLE, my weight property is reset by the animator because I checked default write. Set Write Default to OFF will lock IK, see https://issuetracker.unity3d.com/issues/animation-rigging-animation-states-without-write-defaults-enabled-locks-constraints

I come to you to have an alternative to my problem.
I tried to set the weight when entering IDLE state but it has no effect on the property.

Thank you in advance for your reply.

If you need any additional information, let me know.

Problem solved

I lack experience with animations and I had forgotten but using layers it works perfectly.