HTTP_UPDATE_FAILD Error (-107): New Binary Does Not Fit Flash Size

I´m trying to update via OTA an esp8266-07 but when it download the new .bin from the server it says: "HTTP_UPDATE_FAILD Error (-107): New Binary Does Not Fit Flash Size"

I´m using Arduino IDE with the generic esp8266 board and a flash size: "4M(1M SPIFFS")

This is the output of arduino when i upload the original sketch.

Sketch uses 397,816 bytes (38%) of program storage space. Maximum is 1,044,464 bytes.
Global variables use 34,548 bytes (42%) of dynamic memory, leaving 47,372 bytes for local variables. 
Maximum is 81,920 bytes.
Uploading 401968 bytes from 
C:\Users\luisr\AppData\Local\Temp\arduino_build_217940/TestCercaElectricaCore.ino.bin to flash at 0x00000000
................................................................................ [ 20% ]
................................................................................ [ 40% ]
................................................................................ [ 61% ]
................................................................................ [ 81% ]
.........................................................................        [ 100% ]