"These tokens were owned by the governance contract itself, and therefore couldn't vote. Because they exist and can't vote, it's impossible to ever meet the minimum voter participation. This means governance is permanently disabled, and all other tokens held by the governance contracts are permanently locked."
The code flaw locked up about $750,000 worth of Curve (yCRV) tokens in the YAM treasury, assets intended to serve as a reserve currency to support the value of YAM tokens.