sql – Regex for characters after a symbol

I have a string something like this –

dlYrZLo6HHxROSHDOWZHkh|

I would like to remove the | symbol from this string and it should be – dlYrZLo6HHxROSHDOWZHkh.

However, if I get a string like this

3nXfYzpMktzk4EXnur3Zgc|iDCvlu0TJOIp2WCEwgAQmM

it should remain untouched. The regex I am using here is

^[A-Za-z0-9]+|$ and my HANA SQL query looks as below

select 
  replace_regexpr('^[A-Za-z0-9]+|$' in "id" with '\1' OCCURRENCE ALL) 
from TABLE1

However, I see the below results

May I know where am I going wrong here?