You may submit a Normal Resignation: Tender a direct, unconditional resignation letter to your appointing authority. Do not request a "Technical Resignation", "Lien", or "Pay Protection". Since you applied directly without routing the application through proper channels or securing a No Objection Certificate (NOC), you are not eligible for technical resignation benefits.
Review your offer/appointment letter for notice period stipulations (typically 1 month or pay in lieu of notice for probationers) and any bond/indemnity clauses. Fulfill these requirements to ensure an smooth release.
Ensure your current organization formally accepts your resignation and issues a relieving letter/discharge order. Joining the new organization without a formal relieving order can lead to complications during background verification.
Since you signed a self-declaration/undertaking at the new organization promising to resign and join, you must formally resign from your current post before taking up the new appointment.
Since this will be considered as normal resignation and not a technical resignation, you will not get Pay Protection in the new role.
If your current organization asks why you are leaving, you can cite personal/family reasons or career progression. Since you are still on probation, your resignation is generally easier to accept unless a binding service bond applies.
PRAN will not be affected. Your PRAN (Permanent Retirement Account Number) under the National Pension System (NPS) is portable across all Central/State Government departments, autonomous bodies, and private sectors.
Once you join the new organization, submit your PRAN details to the new Drawing and Disbursing Officer (DDO) or Pay & Accounts Office (PAO). They will execute a Subscriber Modification / DDO-to-DDO Transfer (Inter-Sector Shift) via the CRA portal (Protean or KFintech) to map your account to the new office.