Keyed Each Block Has Duplicate Key

A keyed `{#each list as item (key)}` block produced the same key for more than one item. Key expressions must be unique and stable across re-renders — derive a primitive value (e.g. `item.id`) rather than an object or array, which is never equal to itself between renders.

References

svelte.dev/docs/svelte/compiler-errors

In this namespace

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a11y_missing_attribute bind_invalid_target css_unused_selector derived_references_self each_key_duplicate effect_orphan effect_update_depth_exceeded lifecycle_outside_component snippet_invalid_rest_parameter state_unsafe_mutation