How to add value on custom field using rule action I am new to Drupal. Trying to get it work with Rules module.
I have added new field (decimal type) to user: field_user_custom which I can see in DB as user__field_user_custom as a table.
I want to add value to this table on each article update.
I have setup rule as this:

Create a Reaction rule

React on Event: &quot;After updating content&quot;

Action:
a. Type: set data
b. Data Value: @user.current_user_context:current_user:field_user_custom
c. Value: 888


However, on article update, this value is not updated. I have tested if the rule is applied with having System Msg and it throws the msg but doesn't update the user field.
I doubt my Data Value is not correct. Which is why I have tried with this:

user:field_user_custom

but this didn't help either. What am I missing?
You were close. It's actually @user.current_user_context:current_user.field_user_custom, per "Set a data value"?.