diff --git a/public/app/core/components/TraceToLogs/TagMappingInput.tsx b/public/app/core/components/TraceToLogs/TagMappingInput.tsx
index 3b99a5b26c2..e1c34f99d49 100644
--- a/public/app/core/components/TraceToLogs/TagMappingInput.tsx
+++ b/public/app/core/components/TraceToLogs/TagMappingInput.tsx
@@ -28,7 +28,7 @@ export const TagMappingInput = ({ values, onChange, id }: Props) => {
                 onChange(
                   values.map((v, i) => {
                     if (i === idx) {
-                      v.key = String(e);
+                      return { ...v, key: String(e) };
                     }
                     return v;
                   })
@@ -46,7 +46,7 @@ export const TagMappingInput = ({ values, onChange, id }: Props) => {
                 onChange(
                   values.map((v, i) => {
                     if (i === idx) {
-                      v.value = String(e);
+                      return { ...v, value: String(e) };
                     }
                     return v;
                   })