OpenRTB loss reason 206 definition changed from app bundle to store ID exclusion

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The OpenRTB specification changed the meaning of loss reason code 206 between versions 2.5 and 3.0. In the 2012 OpenRTB 2.5 standard, code 206 indicated an app bundle exclusion. The September 2021 OpenRTB 3.0 list redefined 206 as a store ID exclusion and introduced a new code, 215, for app bundle exclusions. This discrepancy can cause integration issues between systems using different specification versions. Partners must confirm which OpenRTB list an exchange implements to correctly interpret loss alerts.

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