Hi,

By patching FormController, we can restrict auto-save in form views. So ater the patching the data will save only if we save the form manually.Try the following code for patching the form controller:

/** @odoo-module */

import { FormController } from "@web/views/form/form_controller";

import { patch } from "@web/core/utils/patch";

import { useSetupView } from "@web/views/view_hook";

patch(FormController.prototype, {

  setup(){

     super.setup(...arguments);

     this.beforeLeaveHook = false

     useSetupView({

         beforeLeave: () => this.beforeLeave(),

         beforeUnload: (ev) => this.beforeUnload(ev),

     });

  },

  async beforeLeave() {

  /* function will work before leave the form */

     if(this.model.root.isDirty && this.beforeLeaveHook == false){         if (this.env.searchModel && this.env.searchModel.resModel != 'your.model') {

             this.beforeLeaveHook = true

             await this.model.root.save({

                 reload: false,

                 onError: this.onSaveError.bind(this),

             });

         } else {

             this.beforeLeaveHook = true

             this.model.root.discard();

         }

     }

  },

  beforeUnload: async (ev) => {

      ev.preventDefault();

  }

});

Hope it helps.