please help me to debug this issue
on the Sales Stage 10 to 100 works good
when selecting close lost and saving, the probability changing to whatever value configured as the Default Value for this filed .
Please check in Dropdown Editor what you have in ‘sales_probability_dom’ (note that the keys here must be the same as ‘sales_stage_dom’).
That’s the place to configure the probabilities for stages. I don’t think you should have a default value for the “Probability” field defined in Studio / Opp module / fields. Just leave “Default value” empty there.