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Update prevent-tags-from-being-overwritten.md 

Incorporate @ddeyo 's feedback.
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Maria Bermudez 2018-10-18 13:12:26 -07:00 committed by GitHub
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ee/dtr/user/manage-images/prevent-tags-from-being-overwritten.md
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@ -12,7 +12,8 @@ keywords: registry, immutable
By default, users with [read and write access](../../admin/manage-users/permission-levels/) to a repository can push the same tag
multiple times to that repository. For example, when ***user A*** pushes an image to `{{ org }}/{{ repo }}:{{ tag }}`, there is no preventing ***user B***
from pushing an image with the same name but a completely different functionality.
from pushing an image with the same name but a completely different functionality. This can make it difficult to trace the image back to the build that generated
it.
To prevent tags from being overwritten, you can configure a repository to be immutable.
Once configured, DTR will not allow anyone else to push another image tag with the same name.