Warning during processing qrc-files

text.qrc contains
<RCC>
<qresource>
<file alias="text/reg.txt">text/reg.txt</file>
<file alias="text/list.txt">text/list.txt</file>
<file alias="text/fields.txt">text/fields.txt</file>
<file alias="text/amVater.txt">text/amVater.txt</file>
</qresource>

<qresource lang="ru">
<file alias="text/reg.txt">text/ru_reg.txt</file>
<file alias="text/list.txt">text/ru_list.txt</file>
<file alias="text/fields.txt">text/ru_fields.txt</file>
<file alias="text/amVater.txt">text/ru_amVater.txt</file>
</qresource>

<qresource prefix="/translate">
<file>client_ru.qm</file>
</qresource>
</RCC>

rcc is executed with warning

$ /usr/bin/rcc -name text text.qrc -o build/qrc_text.cpp
text.qrc: Warning: potential duplicate alias detected: 'reg.txt'
text.qrc: Warning: potential duplicate alias detected: 'list.txt'
text.qrc: Warning: potential duplicate alias detected: 'fields.txt'
text.qrc: Warning: potential duplicate alias detected: 'amVater.txt'

The finished program is running without errors