diff --git a/src/utils/importSQL/postgres.js b/src/utils/importSQL/postgres.js
index bcc766f..1a0ba2a 100644
--- a/src/utils/importSQL/postgres.js
+++ b/src/utils/importSQL/postgres.js
@@ -120,7 +120,7 @@ export function fromPostgres(ast, diagramDb = DB.GENERIC) {
               const endFieldId = tables[endTableId].fields.findIndex(
                 (f) => f.name === endField,
               );
-              if (endField === -1) return;
+              if (endFieldId === -1) return;
 
               const startFieldId = table.fields.findIndex(
                 (f) => f.name === startField,
@@ -190,7 +190,7 @@ export function fromPostgres(ast, diagramDb = DB.GENERIC) {
             const endFieldId = tables[endTableId].fields.findIndex(
               (f) => f.name === endField,
             );
-            if (endField === -1) return;
+            if (endFieldId === -1) return;
 
             const startFieldId = table.fields.findIndex(
               (f) => f.name === startField,
@@ -314,7 +314,7 @@ export function fromPostgres(ast, diagramDb = DB.GENERIC) {
           const endFieldId = tables[endTableId].fields.findIndex(
             (f) => f.name === endField,
           );
-          if (endField === -1) return;
+          if (endFieldId === -1) return;
 
           const startFieldId = tables[startTableId].fields.findIndex(
             (f) => f.name === startField,