diff --git a/prometheus/app/api/routes/repository.py b/prometheus/app/api/routes/repository.py
index dfd48a2..1fdaa4f 100644
--- a/prometheus/app/api/routes/repository.py
+++ b/prometheus/app/api/routes/repository.py
@@ -68,14 +68,12 @@ async def upload_github_repository(
             upload_repository_request.commit_id,
             request.state.user_id,
         )
-    else:
-        repository = await repository_service.get_repository_by_url_and_commit_id(
-            upload_repository_request.https_url, commit_id=upload_repository_request.commit_id
-        )
 
-    # If the repository already exists, return its ID
-    if repository:
-        return Response(message="Repository already exists", data={"repository_id": repository.id})
+        # If the repository already exists, return its ID
+        if repository:
+            return Response(
+                message="Repository already exists", data={"repository_id": repository.id}
+            )
 
     # Check if the number of repositories exceeds the limit
     if settings.ENABLE_AUTHENTICATION:
diff --git a/prometheus/tools/file_operation.py b/prometheus/tools/file_operation.py
index c1057ce..424e6e1 100644
--- a/prometheus/tools/file_operation.py
+++ b/prometheus/tools/file_operation.py
@@ -64,7 +64,7 @@ class FileOperationTool:
     read_file_spec = ToolSpec(
         description="""\
         Read the content of a file with line numbers prepended from the codebase with a safety limit on the number of lines.
-        Returns up to the first 1000 lines by default to prevent context issues with large files.
+        Returns up to the first 800 lines by default to prevent context issues with large files.
         Returns an error message if the file doesn't exist.
         """,
         input_schema=ReadFileInput,
@@ -129,7 +129,7 @@ def __init__(self, root_path: str, kg: KnowledgeGraph):
         self.root_path = root_path
         self.kg = kg
 
-    def read_file(self, relative_path: str, n_lines: int = 1000) -> str:
+    def read_file(self, relative_path: str, n_lines: int = 800) -> str:
         if os.path.isabs(relative_path):
             return f"relative_path: {relative_path} is a absolute path, not relative path."
 
@@ -245,7 +245,7 @@ def read_file_with_knowledge_graph_data(
         with file_path.open() as f:
             lines = f.readlines()
         # Limit to first 1000 lines to avoid context issues
-        selected_text_with_line_numbers = pre_append_line_numbers("".join(lines[:1000]), 1)
+        selected_text_with_line_numbers = pre_append_line_numbers("".join(lines[:800]), 1)
 
         result_data = [
             {