According to Mars Finance news on August 12, official documents state that Polymarket has announced an update to its oracle mechanism, introducing a new MOOV2 contract to replace the previous OOV2 contract. This change aims to address frequent disputes and market delays caused by premature proposals and inexperience. The most controversial change in the MOOV2 contract is the establishment of a whitelist for proposers. Under the old OOV2 contract, any user could submit a proposal, leading many first-time proposers to lose their deposits due to inexperience, which resulted in market settlements being delayed by up to four days, negatively impacting user experience. The new MOOV2 contract stipulates that only addresses on the whitelist can submit proposals, and users must gather whitelist proposers through Discord. Anyone can still raise objections. This move encourages thorough discussions before proposals, reducing disputes and delays in non-controversial markets. The document states that the limitations of MOOV2 also bring centralization risks, potentially weakening broad community participation and dispute discussions, and lowering oracle transparency. Polymarket's intention is to balance proposal quality with user experience, creating a more efficient market environment.