How to prevent merging of one branch to another

Is there a way to prevent merging of one branch to another. We have branches like 15-maint 16-maint master, we merge forward from 15-maint to 16-maint and also from 16-maint to master but never from 16-maint to 15-maint or from master to 16-maint. Sometimes due to human error, of the person merging, higher branch is merged to lower - like 16-maint to 15-maint or master to 16-maint. Is there any way to prevent this by means of hooks or configs in Bitbucket ?

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Hi Bopanna

You can use branch level permissions and a branch naming convention to limit who has the capability to merge. Take a look at the documentation available at



@Bhushan Nagaraj : Thankyou for the documentation link. But It does not provide the option to achieve what I am asking...

@b bopanna would you please elaborate why branch permissions won't work for you? 

@Ulrich Kuhnhardt [Izymes]: There are 4 restrictions available :

i. Prevent all changes

ii. Prevent deletion

iii. Prevent rewriting history

iv. Prevent changes without a pull request

Now how can I use these to configure my lower branches to not allow merges from higher ? (do not permit merge of master to 16-maint while allowing merging of 15-maint to 16-maint ?)

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