From bbe21a11cea6fb7b2dcc21d64e99b245e198f94d Mon Sep 17 00:00:00 2001
From: Lukas Fritze <l.fritze@mittwald.de>
Date: Mon, 3 Nov 2025 17:12:53 +0100
Subject: [PATCH] fix(interceptors): only set if-event-reached header in
 ConsistencyHandlingInterceptor if not already set

---
 packages/commons/src/interceptors/consistencyHandling.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/packages/commons/src/interceptors/consistencyHandling.ts b/packages/commons/src/interceptors/consistencyHandling.ts
index cb0bd4ce5..7ec90e77d 100644
--- a/packages/commons/src/interceptors/consistencyHandling.ts
+++ b/packages/commons/src/interceptors/consistencyHandling.ts
@@ -11,7 +11,11 @@ function configureConsistencyHandlingInterceptor(axios: AxiosInstance): void {
   let lastEventId: string | undefined = undefined;
 
   axios.interceptors.request.use((config) => {
-    if (lastEventId !== undefined && !isMutatingRequest(config)) {
+    if (
+      lastEventId !== undefined &&
+      !isMutatingRequest(config) &&
+      config.headers["if-event-reached"] === undefined
+    ) {
       config.headers["if-event-reached"] = lastEventId;
     }
     return config;