fix handling PREFERRED gauge

Author: gmbronco

.changeset/sweet-carpets-sleep.md

@@ -0,0 +1,5 @@
+---
+'backend': patch
+---
+
+fix handling PREFERRED gauge

modules/aprs/handlers/liquidity-gauge-apr/liquidity-gauge-apr-handler.ts

@@ -32,7 +32,7 @@ export class LiquidityGaugeAprHandler implements AprHandler {
 
         for (const pool of pools) {
             const gauges = pool.staking.filter((s) => s.type === 'GAUGE').map((s) => s.gauge);
-            const gauge = gauges.sort((a, b) => (a?.status === 'PREFERRED' ? -1 : 1))[0];
+            const gauge = gauges.sort((a, b) => (a?.status === 'PREFERRED' ? -1 : 1))?.[0];
 
             if (!gauge || !gauge.rewards || !pool.dynamicData || pool.dynamicData.totalShares === '0') {
                 continue;