The entire Ethereum community has been awaiting the Constantinople hard fork for over a year now. The initial decision of the hard fork was made in the year of 2017 and the upgrade was scheduled to occur in late 2018. It was later postponed to January 2019 because of issues found in the Ropsten Testnet.
However, much to the expectations of the community, the hard fork was yet again delayed due to another security issue. This issue was bought to light on the eve of the hard fork, resulting in the key stakeholders taking the decision to prolong the upgrade. Additionally, the Parity and Geth team released a new version, which would revert Constantinople hard fork on the Ethereum network.