XDC Private Network stuck at block 1799 with error " Failed to prepare header for new block err="list M1 not found "

I have deployed 3 Miner/sealer nodes and they all were synchronised and were creating new blocks until the network hit the 1799 block creation since then the network has stopped mining any further block and all 3 masternode now show the below error:

Failed to prepare header for new block err="list M1 not found "

All three masternodes were initialised with the genesis.json

All three nodes are hosted on separate machines with distinct IPs