[Fix]: fix could not add submission result to leaderboard after migrate
Template
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@ mention of reviewers
... @ckcollab @BrendanMyers88
A brief description of the purpose of the changes contained in this PR.
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basically i just add filed phase to solve unique_index conflict error and changes logic of "Removing any existing submissions on leaderboard"
Issues this PR resolves
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Known issues to be addressed in a separate PR
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A checklist for hand testing
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add checklist here
Any relevant files for testing
link to any relevant files (or drag and drop into github)
Misc. comments
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Checklist
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Code review by me -
Hand tested by me -
I'm proud of my work -
Code review by reviewer -
Hand tested by reviewer -
Ready to merge