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`UNPLACED_SECTIONS' overflowed by 1024 bytes in Segger Embedded studio

My flash_placement.xml file is here and I am getting this error `.bootloaderSettings' will not fit in region `UNPLACED_SECTIONS'.`UNPLACED_SECTIONS' overflowed by 1024 bytes. Can you help me with this?

<!DOCTYPE Linker_Placement_File>
<Root name="Flash Section Placement">
  <MemorySegment name="$(FLASH_NAME:FLASH)">
    <ProgramSection alignment="0x100" load="Yes" name=".vectors" start="$(FLASH_START:)" />
    <ProgramSection alignment="4" load="Yes" name=".init" />
    <ProgramSection alignment="4" load="Yes" name=".init_rodata" />
    <ProgramSection alignment="4" load="Yes" name=".text" />
    <ProgramSection alignment="4" load="Yes" name=".dtors" />
    <ProgramSection alignment="4" load="Yes" name=".ctors" />
    <ProgramSection alignment="4" load="Yes" name=".rodata" />
    <ProgramSection alignment="4" keep="Yes" load="Yes" name=".dfu_trans" inputsections="*(SORT(.dfu_trans*))" address_symbol="__start_dfu_trans" end_symbol="__stop_dfu_trans" />
    <ProgramSection alignment="4" load="Yes" name=".ARM.exidx" address_symbol="__exidx_start" end_symbol="__exidx_end" />
    <ProgramSection alignment="4" load="Yes" runin=".fast_run" name=".fast" />
    <ProgramSection alignment="4" load="Yes" runin=".data_run" name=".data" />
    <ProgramSection alignment="4" load="Yes" runin=".tdata_run" name=".tdata" />
    <ProgramSection alignment="4" keep="Yes" load="Yes" runin=".fs_data_run" name=".fs_data" />
  </MemorySegment>
  <MemorySegment name="$(RAM_NAME:RAM);SRAM">
    <ProgramSection alignment="0x100" load="No" name=".vectors_ram" start="$(RAM_START:$(SRAM_START:))" />
    <ProgramSection alignment="4" load="No" name=".fast_run" />
    <ProgramSection alignment="4" load="No" name=".data_run" />
    <ProgramSection alignment="4" load="No" name=".tdata_run" />
    <ProgramSection alignment="4" load="No" keep="Yes" name=".fs_data_run" address_symbol="__start_fs_data" end_symbol="__stop_fs_data" />
    <ProgramSection alignment="4" load="No" name=".bss" />
    <ProgramSection alignment="4" load="No" name=".tbss" />
    <ProgramSection alignment="4" load="No" name=".non_init" />
    <ProgramSection alignment="4" size="__HEAPSIZE__" load="No" name=".heap" />
    <ProgramSection alignment="8" size="__STACKSIZE__" load="No" place_from_segment_end="Yes" name=".stack" />
    <ProgramSection alignment="8" size="__STACKSIZE_PROCESS__" load="No" name=".stack_process" />
  </MemorySegment>
  <MemorySegment name="$(FLASH2_NAME:FLASH2)">
    <ProgramSection alignment="4" load="Yes" name=".text2" />
    <ProgramSection alignment="4" load="Yes" name=".rodata2" />
    <ProgramSection alignment="4" load="Yes" runin=".data2_run" name=".data2" />
  </MemorySegment>
  <MemorySegment name="$(RAM2_NAME:RAM2)">
    <ProgramSection alignment="4" load="No" name=".data2_run" />
    <ProgramSection alignment="4" load="No" name=".bss2" />
  </MemorySegment>

</Root>

When I edited my .ld file in UNPLACED_SECTION ==> LENGTH = 0x400 then error was disappeared. But when I rebuild the code error appears again

MEMORY
{
UNPLACED_SECTIONS (wx) : ORIGIN = 0x100000000, LENGTH = 0
FLASH (rx) : ORIGIN = 0x0001b000, LENGTH = 0x00025000
SRAM (wx) : ORIGIN = 0x20001fe8, LENGTH = 0x00006018
}