1. Go to  Administrator > General Configuration > Advanced Settings  
2. Hover over the current value and click to edit. You will see a pencil icon appear. 
3. Set  -1  value for the  jira.newsletter.tip.delay.days 
4. Click on the Update button in front of it.

 Do not press enter to commit the change with the steps above as it may lead to other values getting set to default. This is documented under the following Bug:

• JRASERVER-69900 - Getting issue details... STATUS

To do this via a Database update:

1. Shutdown JIRA.

2. Run the SQL command below to look for the JIRA Insider setting:

   select * from propertyentry, propertystring where propertyentry.ID = propertystring.ID AND  property_key like '%jira.newsletter.tip.delay.days%';

   If you couldn't find get any returned results, please run the second query below and ignore the steps 3.

   1. PostgreSQL

      insert into propertyentry (id,entity_name,entity_id,property_key, propertytype) values ((SELECT max(id::integer)+1 FROM propertyentry),'jira.properties',1,'jira.newsletter.tip.delay.days',5);
       
      insert into propertystring (id,propertyvalue) values ((SELECT max(id::integer)+1 FROM propertystring),-1);

   2. MySQL

      insert into propertyentry (id,entity_name,entity_id,property_key, propertytype) values ((SELECT max(CAST(id AS SIGNED))+1 FROM propertyentry),'jira.properties',1,'jira.newsletter.tip.delay.days',5);
      
      insert into propertystring (id,propertyvalue) values ((SELECT max(CAST(id AS SIGNED))+1 FROM propertystring),-1);

3. Copy the ID from propertystring table and update the propertyvalue column to -1.

4. Restart JIRA.