Upsert banned user group_edge entry group ban (#451)

				if err == sql.ErrNoRows {

					// Ignore - move to the next user ID.

					continue

				} else {

				}

				logger.Debug("Could not delete relationship from group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))

				return err

			}

			}

			query = "INSERT INTO group_edge (position, state, source_id, destination_id) VALUES ($1, $2, $3, $4)"

			query = `

INSERT INTO group_edge (position, state, source_id, destination_id) VALUES ($1, $2, $3, $4)

ON CONFLICT (source_id, state, position) DO

UPDATE SET state = $2, update_time = now()`

			_, err := tx.ExecContext(ctx, query, position, 4, groupID, uid)

			if err != nil {

				logger.Debug("Could not add banned relationship in group_edge.", zap.Error(err), zap.String("group_id", groupID.String()), zap.String("user_id", uid.String()))