# SDK_SEEN_SET_MAX_SIZE_INVALID

- Surface: SDK

## Cause

The seen-set `maxSize` is not a positive integer.

## Fix

Pass a positive integer, or omit it for the default. The seen set is what suppresses duplicate Exposures within the revalidation window; a zero or negative bound would disable dedup silently.

## Related

- [SDK_SEEN_SET_TTL_INVALID](https://splitch.dev/docs/error/SDK_SEEN_SET_TTL_INVALID)

Source: https://splitch.dev/docs/error/SDK_SEEN_SET_MAX_SIZE_INVALID