diff --git a/back/services/env.ts b/back/services/env.ts
index cd4d0a84..ed74ab5f 100644
--- a/back/services/env.ts
+++ b/back/services/env.ts
@@ -27,7 +27,7 @@ export default class EnvService {
       envs.length > 0 &&
       typeof envs[envs.length - 1].position === 'number'
     ) {
-      position = envs[envs.length - 1].position!;
+      position = this.getPrecisionPosition(envs[envs.length - 1].position!);
     }
     const tabs = payloads.map((x) => {
       position = position - stepPosition;
@@ -100,7 +100,7 @@ export default class EnvService {
   }
 
   private async checkPosition(position: number, edge: number = 0) {
-    const precisionPosition = parseFloat(position.toPrecision(16));
+    const precisionPosition = this.getPrecisionPosition(position);
     if (
       precisionPosition < minPosition ||
       precisionPosition > maxPosition ||
@@ -116,7 +116,7 @@ export default class EnvService {
   }
 
   private getPrecisionPosition(position: number): number {
-    return parseFloat(position.toPrecision(16));
+    return Math.trunc(parseFloat(position.toPrecision(16)));
   }
 
   public async envs(searchText: string = '', query: any = {}): Promise<Env[]> {