diff --git a/langchain_postgres/vectorstores.py b/langchain_postgres/vectorstores.py
index 3f741b8b..0fc41eaf 100644
--- a/langchain_postgres/vectorstores.py
+++ b/langchain_postgres/vectorstores.py
@@ -201,7 +201,7 @@ class EmbeddingStore(Base):
         __tablename__ = "langchain_pg_embedding"
 
         id = sqlalchemy.Column(
-            sqlalchemy.String, nullable=True, primary_key=True, index=True, unique=True
+            sqlalchemy.String, primary_key=True
         )
 
         collection_id = sqlalchemy.Column(