This thread is resolved. Here is a description of the problem and solution.
Problem: "domain_name_context_md5" error on WP Dashboard
Solution: The notice you are receiving is known by our developers. Most of the time, it's just a false positive, so you can close the notice and continue working normally. If any errors occur, please contact us.
This is the related documentation: https://wpml.org/errata/duplicate-entry-for-key-uc_domain_name_context_md5/
We also have a dedicated topic for this issue, please write here: https://wpml.org/forums/topic/wpml-is-telling-me-that-it-has-a-broken-table-that-needs-fixing/
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