I. Scenario Reproduction

II. Solutions

1. Module Dependency Check
   If the target model belongs to a different module, add a dependency to that module in your current project configuration.

2. @Base Annotation Filtering
   Models annotated with @Base are excluded from the interface designer's selection by default. Remove this annotation if the model needs to be selectable.

3. Collaborative Development Workaround
   When working in a collaborative development environment, use the model code (not the display name) to search for and select models.