When distributing a survey project to your Community, by default the survey can only be taken once. Once the survey is completed, members cannot complete the survey again. However, for some research projects, the survey may need to be taken multiple times. To allow this, you can enable Sticky Mode when distributing the survey. Sticky mode allows Community members to answer the survey multiple times.
To enable sticky mode, go to: Communities >> Profile >> Default Surveys
This feature is available with the following license :