Screwing up things is normal. One thing I started doing is that when a junior member of the team "screws up", I'd laugh it off and tell them about a major screw up of mine.
The thing is that often my screw-up as a junior was worse (short version: broke a key part of the 'boot' system, was detected friday evening, and we had a major scheduled release on monday morning) and it just puts people at ease. I'll tell it in a humorous way as well. It's important (I think) that they don't feel bad about it.
I've often had colleagues join in on the conversation as well. We're human, we'll make mistakes, no need to stress out over it.
EDIT: added a bit more explanation of _why_ I do so.
The thing is that often my screw-up as a junior was worse (short version: broke a key part of the 'boot' system, was detected friday evening, and we had a major scheduled release on monday morning) and it just puts people at ease. I'll tell it in a humorous way as well. It's important (I think) that they don't feel bad about it.
I've often had colleagues join in on the conversation as well. We're human, we'll make mistakes, no need to stress out over it.
EDIT: added a bit more explanation of _why_ I do so.