# `Cyclium.Migrations.V16`
[🔗](https://github.com/Cyclium/cyclium_ex/blob/main/lib/cyclium/migrations/v16.ex#L1)

V16: Add principal_type to conversations, add principal columns to agent_definitions.

# `down`

# `up`

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*Consult [api-reference.md](api-reference.md) for complete listing*