I did something but i don't know how.
I have 3 tables: t1, t2, t3. Yesterday I create "another table" t4 but something is wrong. In "Manage database" menu in tables tab i cant see t4. In Fields menu at t1 i see fields of t1 and fields of t4. At the same time in drop down menu of layouts i see t1, t2, t3, t4. And in In t1 can see only fields of t1. In t4 can see only fields ot t4.
I just realized what i've done. From manage layouts i created a new layout t4 with some fields of t1.