diff --git a/x/oracle/keeper/band_oracle.go b/x/oracle/keeper/band_oracle.go
index 17e3783..379f468 100644
--- a/x/oracle/keeper/band_oracle.go
+++ b/x/oracle/keeper/band_oracle.go
@@ -3,6 +3,7 @@ package keeper
 import (
 	"context"
 	"fmt"
+	"slices"
 	"strconv"
 	"time"
 
@@ -269,11 +270,13 @@ func (k Keeper) AddNewSymbolToBandOracleRequest(ctx context.Context, symbol stri
 	// check if new symbol's oracle script id is existing
 	for _, req := range allBandOracleRequests {
 		if req.OracleScriptId == oracleScriptId {
-			req.Symbols = append(req.Symbols, symbol)
-			err := k.SetBandOracleRequest(ctx, *req)
-			if err != nil {
-				return errorsmod.Wrapf(types.ErrSetBandOracleRequest, "can not set symbol %s with oracle script id %v", symbol, oracleScriptId)
+			if !slices.Contains(req.Symbols, symbol) {
+				req.Symbols = append(req.Symbols, symbol)
+				if err := k.SetBandOracleRequest(ctx, *req); err != nil {
+					return errorsmod.Wrapf(types.ErrSetBandOracleRequest, "can not set symbol %s with oracle script id %v", symbol, oracleScriptId)
+				}
 			}
+
 			return nil
 		}
 	}