What happened when the mobile phone inexplicably received the SMS verification code?

Maybe someone made a mistake, or maybe someone else accidentally made a mistake. The specific solutions are as follows:

Operating tool: Xiaomi 9

Operating system: miui 1 1.0.

Step 1: Open the SMS application on the mobile phone desktop. As shown in the figure:

Step 2: In the short message, click the option in the upper right corner of "...". As shown in the figure:

Step 3: Then, click to open the "Settings" function. As shown in the figure:

Step 4: In the setting interface, click the "harassment interception" option. As shown in the figure:

Step 5: Find the "SMS Interception" option and click. As shown in the figure:

Step 6: Click the "keyword blacklist" option, as shown in the figure:

Step 7: Click the "Add" option at the bottom after entering. As shown in the figure:

Step 8: Enter the keyword "verification code" and click "Save". As shown in the figure: