What is the right sequence of creating e-way bill and e-invoice so that the numbers are linked properly?

The process for generating an e-way bill in BUSY, Is given below: 
1.: Go to Administration. 
2: Click on Configuration. 
3: Select 'Feature and Options.' 
4: Choose GST/VAT. 
5: Enable E-way Bill and provide the 'Place' and 'Pincode 
6: Fill in all the details for E-way Bill Configuration. 
7: Click on GSP Configuration. 
8: Enter Webtel and Pinnacle ID's. generated through the portal 
9: Go to Voucher Series Configuration and select the voucher type. 
10: Choose the Voucher Series in which you want to use the E-way Bill. 
11: Enable the Transport window on the top right side. 
12: Enable the E-way Bill option on the bottom right side. 
13: Specify the Correct details in the party master such as station Pincode 
14: Specify the UQC in Unit masters for the Eway bill 
15: Specify the HSN Code 
16: Now create the voucher and generate the Eway bill 

For E-invoice Generations, Steps Are given below : 
Step 1: Go to the Administration menu then click on Configuration option. 
Step 2: Now click on Features and Options then click on the GST/VAT button. 
Step 3: Now Enable the E-Invoice required option and click on the configure button. 
Step 4: Mention the From Place and pin code on then e-invoice configuration page. 
Step 5: Enable or disable the next option according to your need and click on the ok button to save it. 
Step 6: Click on GSP configuration and You will see options to enter Webtel and pinnacle IDs. 
Step 7: Open the E-Invoice Portal click on the registration option and enable e-invoicing then Click on the left side e-Waybill portal using your existing credentials. 
Step 8. Go to Registration for GSP and Authenticate yourself with OTP then Add New user. 
Step 9. Choose GSP Name as Webtel Electrosoft Pvt Ltd or Pinnacle Finserv Advisors Private Limited then Enter the appropriate Username and Password and add the user. 
Step 10. Enter the same username along with the prefix and password in the credentials table under GST/VAT GSP configuration in BUSY. 
Step 11. Go to Voucher series Configuration and select the voucher type and its series in which you want to generate E-Invoice. 
Step 12. On the Right side Click on voucher configuration and Enable the Transport window and E-Invoice option on the right side. 
Step 13. Now add the voucher and it's saving time you will see the window, Do you want to generate E-Invoice and then click on it? 
Step 14. You will see the transport window fill it accordingly then select Automatic and Check possible errors and resolve them accordingly. 
Step 15. Press F2 and save this window to generate E-Invoice and print the E-Invoice.