We apologize for this inconvenience. You may have created a scheduled transaction on the Security Bank Online Beta (SBOL2) that is the same as an already existing one in the old Security Bank Online (SBOL 1). Because SBOL 1 is running in parallel with SBOL 2, both transactions will work properly and create a duplicate. Please delete the scheduled transaction in SBOL 1.
If this does not apply to you, please report this as a bug here: https://www.securitybank.com/online-banking/help/feedback/
Disclaimer: These FAQs are only applicable to Security Bank Online Beta.