When rollbacking from Xporter version which has new scopes, the Templates do not appear

When rollbacking from Xporter 6.4.0, the Templates do not appear.

Steps to reproduce:

1. Install Xporter 6.4.0 and add the scope "Automation for Jira" to a Template
2. Uninstall Xporter and install a previous version.
3. Go to Templates page, the templates do not load and an error appears in the logs:

   2020-03-02 17:28:08,914+0000 http-nio-8080-exec-7 ERROR admin2 1046x4802x1 1k5j9l1 0:0:0:0:0:0:0:1 /rest/jiraxporter/1.0/templates/admin/ [c.x.j.rest.services.TemplatesRestService] A sql exception has occured.
   java.lang.NullPointerException
   	at java.util.Objects.requireNonNull(Objects.java:203)
   	at com.xpandit.jiraxporter.rest.services.TemplatesRestService.lambda$mapToTemplateResource$8(TemplatesRestService.java:963)