I am the only user, an administrator but do not have delete issue permission

[Ken Jacobs]

I am using the default permission scheme.

[Alexey Matveev · Accepted solution]

Hello,

Go to the project settings and grant yourself the Delete Issues permission either through a role or a group or the user in the project permission scheme.

You can find more about project permissions here:

https://confluence.atlassian.com/adminjiraserver073/managing-project-permissions-861253293.html 

[Ken Jacobs]

Thanks!