Notification Email turn in loop every 15 minutes

Please help us by providing the following info. Before posting please also check the pinned "Known issues" threads and make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/

Steps to reproduce
1. Server sending a notification email notification activity every 15 minute whtin the same content.
2.
3.

Expected behaviour
Tell us what should happen

Actual behaviour
Tell us what happens instead

Server configuration
Operating system: Centos 7
Web server:Apache
Database: Mysql
PHP version: 5.4
ownCloud version (see ownCloud admin page): 9.1.0
Updated from an older ownCloud or fresh install:
Special configuration (external storage, external authentication, reverse proxy, server-side-encryption):

ownCloud log (data/owncloud.log)

Please paste possible errors in the following code block, see https://central.owncloud.org/t/how-to-find-webserver-or-oc-logfile-enable-php-logfile/808 for more info

Integrity status for oC9+

Login as admin user into your ownCloud and access
http://example.com/index.php/settings/integrity/failed
paste the results here.

Hello,

I resolve it to truncate de table Activity_mq.

But I think it's a bug OC.

Hi,

from your posted issue template:

Before posting please snip make sure that you're running the latest available version for your oC release: https://owncloud.org/changelog/

9.1.0 is quite outdated and you should always use a recent version (like 9.1.2) before reporting any issues with such outdated versions. This avoids that unnecessary support / time is spent on an issue which might be already fixed in a newer version.

If that issue is still happening with 9.1.2 you might want to report a new bug to https://github.com/owncloud/core/issues