diff --git a/backend/src/services/identity-aws-auth/identity-aws-auth-fns.ts b/backend/src/services/identity-aws-auth/identity-aws-auth-fns.ts
index 3732cf5c0..c8b494e7b 100644
--- a/backend/src/services/identity-aws-auth/identity-aws-auth-fns.ts
+++ b/backend/src/services/identity-aws-auth/identity-aws-auth-fns.ts
@@ -87,5 +87,5 @@ export const extractPrincipalArnEntity = (arn: string): PrincipalArnEntity => {
 export const extractPrincipalArn = (arn: string) => {
   const entity = extractPrincipalArnEntity(arn);
 
-  return `arn:aws:${entity.Service}::${entity.AccountNumber}:${entity.Type}/${entity.FriendlyName}${entity.SessionInfo ? `/${entity.SessionInfo}` : ""}`;
+  return `arn:aws:${entity.Service}::${entity.AccountNumber}:${entity.Type}/${entity.FriendlyName}`;
 };
diff --git a/backend/src/services/identity-aws-auth/identity-aws-auth-validators.ts b/backend/src/services/identity-aws-auth/identity-aws-auth-validators.ts
index 183f3cab5..fa2432408 100644
--- a/backend/src/services/identity-aws-auth/identity-aws-auth-validators.ts
+++ b/backend/src/services/identity-aws-auth/identity-aws-auth-validators.ts
@@ -6,7 +6,7 @@ const twelveDigitRegex = new RE2(/^\d{12}$/);
 // akhilmhdh: change this to a normal function later. Checked no redosable at the moment
 
 const arnRegex = new RE2(
-  /^arn:aws:(iam|sts)::\d{12}:(user\/[a-zA-Z0-9_.@+*/-]+|role\/[a-zA-Z0-9_.@+*/-]+|assumed-role\/[a-zA-Z0-9_.@+*/-]+\/[a-zA-Z0-9_.@+*/-]+|\*)$/
+  /^arn:aws:(iam|sts)::\d{12}:(user\/[a-zA-Z0-9_.@+*/-]+|role\/[a-zA-Z0-9_.@+*/-]+|assumed-role\/[a-zA-Z0-9_.@+*/-]+|\*)$/
 );
 
 export const validateAccountIds = z
@@ -55,7 +55,7 @@ export const validatePrincipalArns = z
     },
     {
       message:
-        "Each ARN must be in the format of 'arn:aws:iam::123456789012:user/UserName', 'arn:aws:iam::123456789012:role/RoleName', or 'arn:aws:iam::123456789012:*,', 'arn:aws:sts::123456789012:assumed-role/RoleName/sessionId'."
+        "Each ARN must be in the format of 'arn:aws:iam::123456789012:user/UserName', 'arn:aws:iam::123456789012:role/RoleName', or 'arn:aws:iam::123456789012:*,', 'arn:aws:sts::123456789012:assumed-role/RoleName'."
     }
   )
   // Transform to normalize the spaces around commas