When creating a new conditional logic rule, you receive a "rule name must be unique" error message. From reviewing the left pane, there doesn't appear to be a rule with the same name.
Conditional logic rule names must be unique across the entire form. This means that if a rule is built within a repeatable section, the name cannot be re-used in the main form rules or within another repeatable section.
Ensure that the name is not used within the main form or within other repeatable sections.