diff --git a/crates/milli/src/documents/mod.rs b/crates/milli/src/documents/mod.rs
index 88fa38d30..f43f7e842 100644
--- a/crates/milli/src/documents/mod.rs
+++ b/crates/milli/src/documents/mod.rs
@@ -80,9 +80,13 @@ impl DocumentsBatchIndex {
         let mut map = Object::new();
 
         for (k, v) in document.iter() {
-            // TODO: TAMO: update the error type
-            let key =
-                self.0.get_by_left(&k).ok_or(crate::error::InternalError::DatabaseClosing)?.clone();
+            let key = self
+                .0
+                .get_by_left(&k)
+                .ok_or(crate::error::InternalError::FieldIdMapMissingEntry(
+                    FieldIdMapMissingEntry::FieldId { field_id: k, process: "recreate_json" },
+                ))?
+                .clone();
             let value = serde_json::from_slice::<serde_json::Value>(v)
                 .map_err(crate::error::InternalError::SerdeJson)?;
             map.insert(key, value);
diff --git a/crates/milli/src/error.rs b/crates/milli/src/error.rs
index c977362d6..3dfd3ce0b 100644
--- a/crates/milli/src/error.rs
+++ b/crates/milli/src/error.rs
@@ -33,8 +33,6 @@ pub enum Error {
 
 #[derive(Error, Debug)]
 pub enum InternalError {
-    #[error("{}", HeedError::DatabaseClosing)]
-    DatabaseClosing,
     #[error("missing {} in the {db_name} database", key.unwrap_or("key"))]
     DatabaseMissingEntry { db_name: &'static str, key: Option<&'static str> },
     #[error("missing {key} in the fieldids weights mapping")]
@@ -186,8 +184,8 @@ and can not be more than 511 bytes.", .document_id.to_string()
         valid_fields: BTreeSet<String>,
         hidden_fields: bool,
     },
-    #[error("an environment is already opened with different options")]
-    InvalidLmdbOpenOptions,
+    #[error("An LMDB environment is already opened")]
+    EnvAlreadyOpened,
     #[error("You must specify where `sort` is listed in the rankingRules setting to use the sort parameter at search time.")]
     SortRankingRuleMissing,
     #[error("The database file is in an invalid state.")]
@@ -505,8 +503,7 @@ impl From<HeedError> for Error {
             // TODO use the encoding
             HeedError::Encoding(_) => InternalError(Serialization(Encoding { db_name: None })),
             HeedError::Decoding(_) => InternalError(Serialization(Decoding { db_name: None })),
-            HeedError::DatabaseClosing => InternalError(DatabaseClosing),
-            HeedError::BadOpenOptions { .. } => UserError(InvalidLmdbOpenOptions),
+            HeedError::EnvAlreadyOpened { .. } => UserError(EnvAlreadyOpened),
         }
     }
 }