Today Facing again some Following Error in subgraph

[rajeshbadak1]

Mapping aborted at ~lib/@graphprotocol/graph-ts/chain/ethereum.ts, line 439, column 6, with message: Call reverted, probably because an assert or require in the contract failed, consider using try_getRoundInfo to handle this in the mapping. wasm backtrace: 0: 0x22a3 - !generated/ProofOfHumanity/ProofOfHumanity/ProofOfHumanity__arbitratorDataListResult#constructor 1: 0x4347 - !generated/ProofOfHumanity/ProofOfHumanity/ProofOfHumanity#getContributions 2: 0x4507 - !src/mapping/requestStatusChange 3: 0x48c4 - !src/mapping/addSubmission 4: 0x4988 - !src/mapping/reapplySubmission in handler addSubmission at block #14892895 (f982d6c844c1e3a4c0132efe28454deb78e1969d0af26a7cf627e968ad20e685)

Error while processing block stream for a subgraph: subgraph QmeTuu1DGmRL4AChBG7HsRsaia5HdSS5GQRtmCNag56H6W has already processed block 12365620; there are most likely two (or more) nodes indexing this subgraph