[fix] #1246 Concurrent identities: keep only the most signed one

app/modules/prover/lib/blockGenerator.ts

@@ -279,8 +279,10 @@ export class BlockGenerator {
         const currentMembership = await this.dal.mindexDAL.getReducedMS(ms.issuer);
         const currentMSN = currentMembership ? parseInt(currentMembership.created_on) : -1;
         if (!join.identity.revoked && currentMSN < parseInt(join.ms.number)) {
+          if (!preJoinData[join.identity.pubkey] || preJoinData[join.identity.pubkey].certs.length < join.certs.length) {
             preJoinData[join.identity.pubkey] = join;
           }
+        }
       } catch (err) {
         if (err && !err.uerr) {
           this.logger.warn(err);