diff --git a/src/pipeline/src/etl/transform/transformer/greptime/coerce.rs b/src/pipeline/src/etl/transform/transformer/greptime/coerce.rs
index 71c83dc477..41172a2876 100644
--- a/src/pipeline/src/etl/transform/transformer/greptime/coerce.rs
+++ b/src/pipeline/src/etl/transform/transformer/greptime/coerce.rs
@@ -436,7 +436,8 @@ fn coerce_string_value(s: &String, transform: &Transform) -> Result<Option<Value
             None => CoerceUnsupportedEpochTypeSnafu { ty: "String" }.fail(),
         },
 
-        Value::Array(_) | Value::Map(_) => CoerceJsonTypeToSnafu {
+        Value::Array(_) | Value::Map(_) => CoerceStringToTypeSnafu {
+            s,
             ty: transform.type_.to_str_type(),
         }
         .fail(),