Developer Details Migrating a Live Speaker Database from One-to-One to Many-to-Many

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A developer describes building a speaker roles feature for an event platform, first shipped as a one-to-one relationship before requirements shifted to many-to-many. Existing events were live with integrations and API clients, so changes had to roll out without breaking anything. To keep compatibility, every event got an automatic default role, existing speakers were migrated to it, and the roleId field was made optional in the API. When a question arose about the legacy free-text custom field, production data showed it was sparsely used and too inconsistent to map reliably, so the author proposed an organizer-controlled toggle instead of an automatic migration.

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