SAP License Installation with Difference System Number

You are installing a SAP license but ended with below error,

This system's system number is "00000000056789", but there is a license key 
for system number "0000000001234567" in file "/sapmnt/SID/profile/lesen.txt".

Solution

• Refer to SAP Note 94998.

or

• Delete all the license, request a new license and install the license.

or faster way,

• Edit the system number. Example from below error, change the system number “0000000001234567” to “00000000056789” via notepad. You can now install the SAP license through operating system or SAP level.