Temperature-induced phase transitions in the 'cluster' magnetic bubble lattices on thin ferrite-garnet films were investigated. The term 'cluster' magnetic bubble lattice is used to denote a structure containing a large number of disoriented hexagonal lattice clusters. To explain discontinuous and continuous transitions from the cluster lattice to the structure consisting of two phases (stripes and lattices), the thermodynamic method was used. Transition temperatures were calculated and showed good agreement with experimental results.